Looking for isekai manhwa beginning in a high-school's gym where peoples have to pass trials

I forgot the real beginning of how the main character got involved, but he has to come to a meeting taking place in a gym with many random peoples (here for the same reason). Some chosen peoples get stuff (the MC receives a gold bag) and the first test begins : simply get out of the gym but in limited time. Once outside, the survivors must get into the high-school building, then inside they'll have to face new trials (escape monster, find items, etc) to finally reach the roof to complete the quest. On the roof there is a portal to a new zone (seems like hotel's interior) for resting, where they can get quests (from a board) to improve their skills. The survivors have months to improve before a war start...


How do I stop or start the desktop from loading on bootup?

I occasionally want to use my Ubuntu machine as a desktop but mostly  as a headless file server.  Before I upgraded to Oneiric, I  used rcconf services to disable or enable the desktop.  In Oneiric I  don't see GDM; so can't uncheck it.  LightDM appears but isn't checked. I don't see anything else that looks like a desktop.  So, how can I disable, an occasionally enable, the Oneiric desktop?


What rules are for a product of negative numbers under same exponent?

Though it is a really simple question, I am stuck in explaining myself where I break the rules. $$\sqrt{-3}\sqrt{-3} = i^2\sqrt{9}=-3=(-3)^{\frac{1}{2}}(-3)^{\frac{1}{2}} = (-3)^{\frac{1}{2}+\frac{1}{2}}=-3$$ but in the next one, there's something wrong and I do not understand what it is: $$(-3)^\frac{1}{2}(-3)^\frac{1}{2}=((-3)(-3))^\frac{1}{2}=\sqrt{9}=3$$ That is, why cannot I get the product of the bases since I have the same exponent?


Use of TSA locks embedded in luggage in Europe?

I bought a luggage with a TSA lock on the side of the luggage, which holds the zipper.   Can I use this lock, or will they break my entire luggage if they need to inspect it (considering most European airports seem not to have access to a TSA masterkey).


My question is different form the question  because I already know how to set footnotes in tabular environments. But I don't know how to correctly use two ore more footnotes that appear together in one table. The other question is not dealing with this special issue.    I have this latex document:  \documentclass{scrbook} \usepackage{scrlayer-scrpage} \begin{document} Text before the table\footnote{This is the 1st footnote}  \begin{tabular}{cl} $k_B$ & Boltzmann constant\footnotemark $k_B = 1,380649 \cdot 10^{23} J/K$\\  $f$ & degrees of freedom\footnotemark \\  \end{tabular} \footnotetext{named after Boltzmann} \footnotetext{Another word for possibilities}  Text after the table\footnote{This is the last footnote} \end{document}   I get this body, which is ok:    There are four points with footnotes, each of them has its own distinct number, as it should be. Everything is fine here.  But I get these footnotes:    As you can see, the second footnote (which is the first of two inside the table) has a wrong number. The numbers should be 1-2-3-4, but they are 1-3-3-4.    How can I get the correct numbers?    === Reaction to an answer ===  Fran posted  but his solution is just a weak workaround that doesn't work properly in bigger documents with dozens of footnotes.  Suppose you are writing a book, and the table with the two footnotes is on page 580. You create the footnotes like in Fran's workaround, and 3 month later you add another text with another footnote on page 215. I want that all footnotes are correct even after adding or removing preceding footnotes.  An Example:  \documentclass{scrbook} \usepackage{scrlayer-scrpage} \usepackage{lipsum} \begin{document} \chapter*{Issue with footnotes in tables} \lipsum[1]  % =========================================================== % Toggle the next line % Subsequently added text with a new footnote \footnote{additional footnote} % ===========================================================  \lipsum[66]  Old text with a footnote\footnote{an old footnote} before the table.  \section*{Table}  \begin{tabular}{cl} $k_B$ & Boltzmann constant\footnotemark[2]\  $k_B = 1,380649 \cdot 10^{23} J/K$\\  $f$ & degrees of freedom\footnotemark[3] \\  \end{tabular}  \addtocounter{footnote}{2} \footnotetext[2]{named after Boltzmann} \footnotetext[3]{Another word for possibilities}  Text immediately after the table\footnote{immediately after the table}  \lipsum[75]  Text with a footnote\footnote{This is the last footnote} \end{document}   This code produces this output:    But then I add some Text with another footnote before the table:  % =========================================================== % Toggle the next line Subsequently added text with a new footnote \footnote{additional footnote} % ===========================================================   and I get this:    Now not only the numbers in the footnotes at the bottom of the page are wrong, but also the numbers in the table itself.


What does it mean by automatically lifted?    The ban will be lifted automatically by the system when it determines that your positive contributions outweigh the cost of those questions which were poorly received.  I am a software engineer so I doubt that the system itself can actually evaluate the updates to the questions. It probably requires input from humans.   Do people regularly look at closed questions and re-evaluate them? It seems to me that once a question is closed there is a strong bias against reopening it, thus being blocked from asking questions is hopeless.   I have a high reputation (top 10% for the year) and I thought this would prevent question bans so I had no idea that I had to be very careful about asking questions.   If I knew this I would have asked some easy questions to get my question reputation up before I asked the very difficult ones. Stack Exchange doesn't seem to be very good at communicating this crucial information.     I don't think that this is a duplicate because I was originally thinking that artificial intelligence might examine the questions. That people look at the questions and that the questions are put to the top of the home page so that they can be reviewed were two aspects that may be unique to this question.   When referring to the other post it says that the ban will be lifted from other positive contributions. I currently have a reputation that is in the top 10% for the year why is that not enough positive contributions?


How far should we go in judging question ethics?

I recently happened across this question:    The OP asks about writing code in C/C++ to make a file "hidden or undeletable." Rather than close or downvote the question for its (rather obvious) flaws, the majority of the community jumped on the OP for "reek[ing] of viral intentions."  To me, that question doesn't necessarily only have applications in the malware market. But even if it does, is it within the purview of the community to close it for such? It's still a valid programming question, is it not? It just struck me as a bit much that three different commenters asked about possible legitimate uses for such code, with one going so far as to warn the OP that IPs are logged at SO.


How comment lines in XML file using Batch file?

I have a file context.xml which contains following..  <import resource="beans.xml"/>   I need to comment this line as follows using batch file.. Please help.. Thanks in advance..  <!--import resource="beans.xml"/-->   I tried this.. But its not working..  @echo off  setlocal enableextensions enabledelayedexpansion  set "search= <import resource="beans.xml"/> " set "replace= <!--import resource="beans.xml"/--> "  set "textFile=context.xml"  for /f "delims=" %%i in ('type "%textFile%" ^& break ^> "%textFile%" ') do (     set "line=%%i"     setlocal enabledelayedexpansion     set "line=!line:%search%=%replace%!"     >>"%textFile%" echo(!line!     endlocal )


How do I upgrade an iPhone 4 from iOS 7.1.2 to iOS 8 or 9

I have an iPhone 4 and I need to upgrade from 7.1.2 to iOS 8 or 9. I would like to ask how I can get iOS 8.


I had someone design a logo for me and I told him it needed to be in a format that I can resize without losing quality and transparent.  He sent me a transparent PNG file.   If I use a site like pixlr or canva to resize it then I lose the transparency. If I use the file he sent me then the transparency works but the size is wrong.   How do I use the file he sent me and be able to resize it without losing transparency so I can use it on my website? Thank you for your help.


Installed Ubuntu alongside Windows 8, and W8 won't boot anymore

I've bought a Dell laptop with W8 pre-installed. I didn't like W8 much, so I wanted to try Ubuntu, but without uninstalling W8. So yesterday I installed Ubuntu, and it was extremely convoluted thanks to the gorgeous W8 UEFI boot mode.  Anyway Ubuntu is now installed and working with no problem. However I cannot boot on W8 anymore, which is a serious issue.  I tried Boot repair, first with the boot option in Legacy mode, then in UEFI. Boot repair tells me it got it fixed, but I still can't boot on W8.  When I boot, I have two options to boot on Windows: Windows UEFI bkpbootmgfw.efi and Windows Boot UEFI loader.  When I select any of them, I got the following error:   No such device BCE6-E3C4 /EFI/Microsoft/Boot/bkpbootmgfw.efi not found.   OR  No such device BCE6-E3C4 /EFI/Boot/bkpbootx64.efi not found.   I checked on my computer, and unexpectedly, I did find the two files, located at /boot/efi/EFI/Microsoft/Boot/bkpbootmgfw.efi or /boot/efi/EFI/Boot/bkpbootx64.efi.  My computer has 2 hard drives. When I got the computer, the second one was empty, so I decided I'd install Ubuntu on my second hard drive, and keep W8 on my first one. Maybe that's the problem, maybe the bios or whatever it is is looking in the first hard drive for the efi files, while they are supposedly in the second one.  I've tried lots of stuff on the Internet (like updating grub's config) but nothing's worked so far.  Boot repair told me to paste this link if I need help, so here we go:   I read but that didn't help me much.  Does anyone know how to fix this? I can still access to my data on my first hard drive, but I still have many useful programs on Windows. I notably program in C++ for Windows, so I must, in order to compile for the OS, boot on Windows.


Can. MacBook Pro run in closed-display mode without physically. closing the lid?

I have two external monitors with my MacBook pro. I'd like to keep the MacBook lid open for speaker quality - listening to music, but have the same result as it would be closed with external monitors. Changing the brightness of the laptop screen to None does not eliminate the unnecessary screen. Is this possible to blank the screen while the lid is up and the keyboard is clear?


I want know wether "defnitions" are if and only if. For example if a set satsfies all four group axioms we say it is group but then we go other way also.  thank you.


java.lang.NullPointerException: Attempt to invoke virtual method on a null object reference

I am trying to save player's name in shared preference and make it display in another activity by getting it again in shared preference but my app crash.  FATAL EXCEPTION: main   Process: plp.cs4b.thesis.drawitapp, PID: 1970  java.lang.RuntimeException: Unable to start activity ComponentInfo{plp.cs4b.thesis.drawitapp/plp.cs4b.thesis.drawitapp.PlayGame}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String plp.cs4b.thesis.drawitapp.Player.getName()' on a null object reference     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)     at android.app.ActivityThread.access$800(ActivityThread.java:144)     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)     at android.os.Handler.dispatchMessage(Handler.java:102)     at android.os.Looper.loop(Looper.java:135)     at android.app.ActivityThread.main(ActivityThread.java:5221)     at java.lang.reflect.Method.invoke(Native Method)     at java.lang.reflect.Method.invoke(Method.java:372)     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)  Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String plp.cs4b.thesis.drawitapp.Player.getName()' on a null object reference     at plp.cs4b.thesis.drawitapp.PlayGame.onCreate(PlayGame.java:20)     at android.app.Activity.performCreate(Activity.java:5933)     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)     ... 10 more   Codes:  Player.java  public class Player {  private Context context; private SharedPreferences prefSettingsU; private SharedPreferences.Editor prefEditorU; private static final int PREFERENCE_MODE_PRIVATE = 0; private static final String MY_UNIQUE_PREF_FILE = "DrawItApp";  public Player(Context context, String name) {     this.context = context;     saveName(name); }  public void saveName(String n) {     prefSettingsU = context.getSharedPreferences(MY_UNIQUE_PREF_FILE, PREFERENCE_MODE_PRIVATE);     prefEditorU = prefSettingsU.edit();     prefEditorU.putString("keyName", n);     prefEditorU.commit(); }  public String getName(Context ctx) {     prefSettingsU = ctx.getSharedPreferences(MY_UNIQUE_PREF_FILE, PREFERENCE_MODE_PRIVATE);     String name = prefSettingsU.getString("keyName", "ANONYMOUS");     return name; }   PlayGame.java  public class PlayGame extends Activity {  private TextView welcomePlayer; private ListView createdGames; private Player mPlayer;  @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.play_game);      welcomePlayer = (TextView) findViewById (R.id.tvPlayerName);     welcomePlayer.setText("Welcome Back, " + String.valueOf(mPlayer.getName(this)) + " !");      createdGames = (ListView) findViewById (R.id.listCreatedGames);     // adapter etc     createdGames.setEmptyView(findViewById (R.id.tvNoGames));   }   PlayerName.java  public class PlayerName extends Activity {  private EditText playerName; private Player mPlayer; public static Context context;  @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.player_name);     context = this;     playerName = (EditText) findViewById (R.id.etName);  }  public void onC_Confirm(View btnclick) {     mPlayer = new Player(context, String.valueOf(playerName.getText()));     //mPlayer.saveName();     Intent intent = new Intent(PlayerName.this, PlayGame.class);     startActivity(intent); }  public void onC_testShPref(View btnclick) {     Intent intent = new Intent(PlayerName.this, PlayGame.class);     startActivity(intent); }


How do I permanently add to $PATH for all users?

I made a directory /opt. How can I add it to the path for all users?  I tried adding it to /etc/profile but it didn't work.  # /etc/profile: system-wide .profile file for the Bourne shell (sh(1)) # and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).  if [ "`id -u`" -eq 0 ]; then   PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt" else   PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/opt" fi export PATH


How can I automate adding sender addresses to a Rule in macOS Mail?

So I've created a Mail Rule "Bin Spam Messages" that will delete messages from a sender. What I can't figure out is how to automate adding new sender addresses to the rule. I'm guessing I could do this with AppleScript but I'm also trying to do it without opening the message. The goal is to automatically delete spam messages from my inbox and junk mail folders. I thought this was what the Apply Rules menu option was for but apparently not. Any ideas?  Update: I have tried updating SyncedRules.plist using a Shell script (below) but (a) it doesn't show up in Mail preferences; and (b) SyncedRules is restored after relaunching Mail. Not sure where else Mail rules are stored.  #! /bin/zsh  # Generate 128-bit UUID CRITERION_UNIQUE_ID="$(uuidgen)"  # Define Shell input variables EXPRESSION="$1" HEADER="$2"  # Define SyncedRules.plist file FILENAME="/Users/tim/Library/Mail/V7/MailData/SyncedRules.plist"  # Run plutil plutil -insert 0.Criteria.0 -xml "<dict><key>CriterionUniqueId</key><string>$CRITERION_UNIQUE_ID</string><key>Expression</key><string>$EXPRESSION</string><key>Header</key><string>$HEADER</string></dict>" $FILENAME   This script inserts a dictionary into the first items Criteria array containing a 128-bit UUID, sender email address and email header, but my issue is persistence. If I run the command with sudo, I can update the SyncedRules.plist but Mail doesn't recognise the changes and the .plist is restored when Mail relaunches, anyway.  Getting warmer...  More Updates: So I doubled back and had a look at the Mail library in Script Editor.. then discovered this answer  - there's a block there that I'm particularly interested in... something like make new rule with properties {header:"", expression:thisItem, rule type:from header, qualifier:equal to value} condition - I think this is where I'm heading now.


I was trying to install wine on my desktop install of 18.04 bionic and the website was formatted in a way I couldn’t highlight the commands so I started typing them on my tiny keyboard, with no backlight, and as a goon, I typed a typo, with the website dl.winehq.prg vs. org.  Well I exited the terminal (all terminals in fact) and put the web page into reader view and was able to copy the commands flawlessly, but when I try to run it again, typed correctly, it tries to access that website at .prg again, what do I do?


Well , I know what does "Call it a night" mean, but I wanted to know if I could say "call it a day". E.g I'm working on a project in my office. And suddenly my parents call me up, can I say "let's call it a day " here?


Metrizable topological space $X$ with every admissible metric complete then $X$ is compact

How to prove:      If $X$ is a metrizable topological space and every admissible metric on $X$ is complete then $X$ is compact.    I was trying with an idea of contradiction and thereby to construct an incomplete metric on $X$. But not able to construct.


If I have a visitor visa for Switzerland (Schengen visa), can I visit France?

I'm an Indian citizen and I have got a UK visitor visa.  I hope to travel to France for 4 days, however we were not able to get an appointment. So now we are planning to get a visa for Switzerland (Schengen visa), and visit France. Is it permissible to visit France and not Switzerland on the Schengen visa?


Remove evolution-calendar-factory from startup

Is there a way of removing it from startup? I don't need it and I'm not using evolution at all.


Show that there is $\xi$ s.t. $f(\xi)=f\left(\xi+\frac{1}{n}\right)$

Let $f:[0,1]\to\mathbb{R}$ be continuous and $f(0)=f(1)$. Show that for any integer $n\geqslant 2$, there is $\xi\in(0,1)$ s.t.$f(\xi)=f\left(\xi+\frac{1}{n}\right).$  I think this requires the intermediate value theorem somewhere.


What are the differences between "su", "sudo -s", "sudo -i", "sudo su"?

I already read it from manual but I can't see difference..  su - change user ID or become superuser  sudo -s [command]   The -s (shell) option runs the shell specified by the SHELL environment variable if it is set or the shell as specified in passwd(5).  If a                    command is specified, it is passed to the shell for execution.  Otherwise, an interactive shell is executed.  sudo -i disappear description in manual


Why aren't the functions $f(x) = \frac{x-1}{x-1}$ and $f(x) = 1$ the same?

I understand that division by zero isn't allowed, but we merely just multiplied $f(x) = 1$ by $\frac{x-1}{x-1}$ to get $f(x) = \frac{x-1}{x-1}$ and $a\cdot 1 = 1\cdot a = a$ so they're the same function but with different domain how is this possible?  Or in other words why don't we simplify $f(x) = \frac{x-1}{x-1}$ to $f(x) = 1$ before plotting the points. Is it just defined this way or is there a particular reason ?  Note: my book says the domain of $f(x) = 1$ is $\mathbb{R}$ and the domain of  $f(x) = \frac{x-1}{x-1}$ is $\mathbb{R}$ except $1$.


Contacts in Mavericks Messages display phone numbers instead of contact names

Since updating to Mavericks the Messages app doesn't display the contact names for people I've been communicating with iMessage, it shows their phone number instead. My messages thankfully still stay synced between my iPhone and Messages on Mavericks.


Is Oppenheimer's quote "I am become death" grammatically correct?

After  made his discoveries of nuclear energy, he said a quote from Bhagavad-Gita, it goes as follows      I am become death, the destroyer of worlds.   Is this proper English?


I need to put two logo images on the same line, vertically centered relative to each other. Something like this:  This alone I could easily achieve with CSS vertical-align: middle;, but I also need the images to be at the very left and and the very right respectively; so normally I would do it with float: left and float: right, but then vertical-align stops working... Another constraint is that I do not write HTML manually, but rather it is generated by a tool (pandoc, to be precise). So long story short, I have the following two options for HTML: Option 1:

  Option 2:

  Could you please help me styling any of these HTML snippets, so that I get the two images vertically centered within the "logo-block" boundaries, with "logo1" at the very left and "logo2" at the very right?


Why the limit of $\frac{\sin(x)}{x}$ as $x$ approaches 0 is 1?

I need a rigorous proof that verify why the limit of $\dfrac{\sin(x)}{x}$ as $x$ approaches $0$ is $1$.  I tried before but i do not know how start this proof. I would appreciate if somebody help me. Thanks.


Would it be OK to switch from the alias I used when I signed up to my actual name?

As the activity piles up over the past 1+ years I'm starting to view it as a potential resume building thing and wishing I had used my real name.  Any issues (and is it possible) to switch it?


Got an ArrayList like that. Wanna find how many values are repeated: Example: person:4 times , girl:4 times  public ArrayList<String> new_contains_all= new ArrayList<>();   ...  [[laying, beautiful, brushing, group, young, head, bed, close, couple, female, teeth, white, indoor, pair, holding, sunglasses, stuffed, wearing, posing, dress, person, hair, standing, looking, girl, red, playing, made, top, woman, lady, hat, clothing, goggles, people],      [person, hair, young, shirt, looking, phone, girl, white, glasses, food, sunglasses, wearing, woman, hat], [blue, beautiful, person, cake, standing, young, shirt, black, female, board, girl, white, photo, holding, ready, wearing, top, posing, woman, lady, smiling, clothing, dress, suitcase], [street, clock, light, stop, sign, red, text, sitting,      man, photo, traffic], [blue, person, young, looking, phone, sitting, female, girl, photo, computer, using, red, laptop, holding, glasses, food, sunglasses, wearing, top, woman, lady, hat]]   Notify that the Array have 5 elements inside.  Already tried this, that should be working for simple ArrayList but with more than 1 string per element its creepy, i know the solution must implement another bucle inside key, but so tired for today :/ maybe someone blinks my mind :P  List<String> l = new_contains_all; Set<String> s = new HashSet<String>(l); for (String key : s) {     int count = Collections.frequency(l, key);     if (count > 1)         System.out.println("Found '" + key + "' " + count + " times."+"key: "+key.toString()+"l: "+l.toString()); }


What is the best way of transferring money from American to Canadian bank?

I am a Canadian that will be working in US for some time. I will still have Canadian bills to pay, so I would need to regularly transfer US dollars from some US bank to my Canadian bank account in $CAD. What is the least expensive and easy way of doing this?


Is there a program that allows me to send audio output to a microphone input (either real or virtual microphone)?

I've tried using VAC virtual audio cable, as well as virtual audio streaming. Unfortunately, none of these solutions provide a way to send audio output to a microphone input. None of the virtual audio cable related posts on here or internets address this specific limitation.   The reason I want to do this is to stream audio to the microphone and set the microphone as input device for another program. This "other program" only allows microphone inputs to be used as its input device.  See how no mic's are listed as output devices:    There is a software called Solicall which actually allows this. But I would like to do this through VAC virtual audio cables because Solicall only allows one instance running. Thus, I can't do my audio routing method more than once simultaneously. I have yet to find a better solution however than Solicall.  Someone please post if you found a way to do this with virtual audio cables, or any solution more elegant than Solicall. Currently, all the virtual audio cable programs I've tried do not allow microphones (real or virtual) to be selected as output.


Center div horizontally and vertically with container of 100% width and height

What is the best way to center div in the middle of another element?  I have an container with with set to 100% and height to 130% of the screen but i fail to centr it int the middle ( of the container ). i tried using  div {     margin: auto;     top: 0;     bottom: 0;     right: 0;     left: 0;     position: absolute;     text-align: center;     vertical-align: middle; }   But this will just set the the content of div in the middle horizontally only , and set the width and height of the inner element to container element.  What is the best trick to achieve such thing?  is demo


Continous, Non-Fourier, Trigonometric Approximation of the Fractional Part Function

I would like to know a single (not piecewise) continuous approximation of $x \bmod 1$ which gets sharper the more you increase a constant $c$. I do not want a series like Fourier, but I do want something that uses continuous trigonometric functions (though $\arcsin$ is fine).


How do I open an app in my new mac book pro

I just bought a new mac book pro.  I am pretty sure I transferred my apps from my iPad to my mac book pro.  How do I open the apps now in my new mac book pro?  I can see all my apps in the iTunes library but when I double click on them, nothing happens.  Any help is appreciated.  Thank you


Short story about "leaping" (matter transfer without "beaming")

This was a story, perhaps a novella,  1960s era, that began by explaining "leaping"--the ability to transfer from place to place, but without any external device. The origin story was that a scientist accidentally created some explosive force and leaped to safety before he was in danger.  The story continued to explain all sorts of advances and the institutionalization of "leaping" (leaping stations, etc.)


Is there any software that lets you create shortcuts?

Few years ago I used a software that lets you define shortcuts for the ubuntu OS. Cannot find it now, any idea?


How would I make a smooth crease in illustrator?


how to calculate area if it is falling in two utm zones

I am using ArcGIS 10.1. How do I calculate an accurate area measure for a polygon, where portions of it are falling in two zones, i.e. UTM ZONE 44 & 45 (India)?


My wife purchased 2 M&M Family Frozen Meat Lasagnes and left them in a thermal freezer bag in the rear of the Escape. I found them two days later as I was taking her vehicle in for service, and they were thawed. Are these lasagnes still safe to eat if cooked, and if so, can they be refrozen? According to the ingredients the noodles are cooked and I assume the beef has been.


Finding the intermediate fields of $\Bbb{Q}(\zeta_7)$.

Let $F= \Bbb{Q}(\zeta_7)$ with $\zeta_7 = e^{2\pi/7}$. a) What is the Galois group of $F$ over $\Bbb{Q}$? b)Find all intermediate fields between $\Bbb{Q}$ and $F$. (Write each in the form $\Bbb{Q}(\alpha)$ for some specific $\alpha \in F$.) c) For each intermediate field $E$ above, give the Galois group of $E$ over $\Bbb{Q}$.  a) Since $\Bbb{Q}(\zeta_7)$ is the splitting field for the cyclotomic polynomial $x^6+x^5+...+1$, $Gal(\Bbb{Q}(\zeta_7)/\Bbb{Q}) \cong U_7 \cong \Bbb{Z}^{\times}_7 \cong \Bbb{Z}_6$. b) $Gal(\Bbb{Q}(\zeta_7)/\Bbb{Q}) \cong \Bbb{Z}_6$ So we have the following diagram for $\Bbb{Z}_6$,  And a corresponding diagram for $\Bbb{Q}(\zeta_7)$ for some $\alpha$ and $\beta$  Since $\Bbb{Q}(\zeta_7)$ has complex numbers, we can look at $\Bbb{Q}(i)$ to see if it has degree 2 or 3 over $\Bbb{Q}$. Since $x^2+1$ is its minimal polynomial, we see that $[\Bbb{Q(i)} : \Bbb{Q}]=2$ and so it must correspond to $\Bbb{Z}_3$, and $\beta=i$. Sending every number to its conjugate is one possible automorphism. Of course, it has order 2 and so is isomorphic to $\Bbb{Z}_2$. Since it fixes every real number, the corresponding intermediate field must be of the form $\Bbb{Q}(\alpha)$ for some real number $\alpha$, and must have degree 3 over $\Bbb{Q}$. If we look at $\zeta_7 + \zeta_7^6$, we see that $\cos(2\pi/7) + i\sin(2\pi/7) + cos(12\pi/7) + i\sin(12\pi/7)$ $= \cos(2\pi/7) + i\sin(2\pi/7) + \cos(-2\pi/7) + i\sin(-2\pi/7)$ $= 2\cos(2\pi/7)$ which is irrational. So $\Bbb{Q}(\zeta_7 + \zeta_7^6)$ is either a proper subfield of $\Bbb{Q}(\alpha)$ or is equal to it. But from the diagram, we know that there is only one other intermediate field, so $\Bbb{Q}(\zeta_7 + \zeta_7^6) = \Bbb{Q}(\alpha)$. c) The corresponding Galois group of $\Bbb{Q}(i)$ is isomorphic to $\Bbb{Z}_3$ and that of $\Bbb{Q}(\zeta_7 + \zeta_7^6)$ is isomorphic to $\Bbb{Z}_2$. Do you think this is correct? Thanks in advance


java - How do I remove an object from an ArrayList if a condition is met?

I want to remove some objects (if they meet a condition) of an ArrayList while looping through it. But that will obviously throw a 'ConcurrentModificationException'.  So, what's the best way of doing this?  edit: My condition is a number comparision, so if an objects' variable is greater than a value, the object must be removed from the list..


Exterior power "commutes" with direct sum

I know that for vector spaces $V, W$ over a field $K$, we have the following identity :  $$ \bigoplus_{k=0}^n \left[ \Lambda^k(V) \otimes_K \Lambda^{n-k}(W) \right] \simeq \Lambda^n(V \oplus W) $$ which holds in a canonical way : for $0 \le k \le n$, the maps  $$ \Lambda^k(V) \times \Lambda^{n-k}(W) \to \Lambda^n(V \oplus W), \\ (v_1 \wedge\cdots \wedge v_k,w_{k+1} \wedge \cdots \wedge w_n) \mapsto (v_1 \wedge \cdots \wedge v_k) \wedge (w_{k+1} \wedge \cdots \wedge w_n) $$ factors through the tensor product's universal properties, which gives us a map $\varphi_k : \Lambda^k(V) \otimes_K \Lambda^{n-k}(W) \to \Lambda^n(V \oplus W)$, and since the category of $K$-modules has biproducts, we get a canonical map  $$ \varphi = \bigoplus_{k=0}^n \varphi_k : \bigoplus_{k=0}^n \left[ \Lambda^k(V) \otimes_K \Lambda^{n-k}(W) \right] \longrightarrow \Lambda^n(V \oplus W) $$  What if I replace $K$ by a (commutative ring with $1$) ring $A$? Does this map have a kernel? I know it is surjective (it suffices to "look at it", i.e generators of the codomain are obviously all hit by $\varphi$). I don't know if it helps, but I am working in integral domains. In the field case, this is obvious if $V$ and $W$ are finitely generated, since one can use dimension arguments. I wouldn't mind if the above identity held only in the finitely generated case either. If it worked in general it would be cool though.   Note that when trying to compute the inverse map with the universal property, there seems to be a problem... my guess would have been $$ (v_1 + w_1,\cdots,v_n + w_n) \mapsto \bigoplus_{k=0}^n (v_1 \wedge \cdots \wedge v_k) \otimes (w_{k+1} \wedge \cdots \wedge w_n) $$ and this map is obviously $A$-multilinear, but there is a problem with the alternating property ; I get some terms left. I'm guessing this is the wrong map... if there is one.


Likelihood simplex distribution and model simulation

Let $y_i$ have  with density $$f(y;\mu,\sigma^2)=[2\pi\sigma^2\{y(1-y)\}^3]^{-1/2}\exp\{-\frac{1}{2\sigma}2d(y,\mu)\}$$ where $\mu\in(0,1)$ , $\sigma^2>0$ is a unit deviance function and $d(y,\mu)=\frac{(y-\mu)^2}{y(1-y)\mu^2(1-\mu)^2}$.  I need to find the likelihood of each observation, because I need to simulate data from this distribution (Bayesian simulation). Suppose I take the logarithm of the density function, as follows   $$-\log(f(y,\mu,\sigma^2))\propto\frac{1}{2}\log[\sigma^2[\{y(1-y)\}^3]+\frac{1}{2\sigma^2}d(y,\mu)$$,  is this the likelihood of each observation, or is there some other method of finding the maximum likelihood?


I have monitored some problems with the IP configuration during job execution. It looks like the DNS server name and the domain suffix is changed sometimes.  I would like to find corresponding events in the event log. For this purpose I want to know: How can I identify the point of time when the IP configuration change occurred?  Edit: The question has been marked as duplicated. The referred question handle the IP history of the PC. But none of these other questions (and answer) touch the important detail:     What DNS server address has been assigned at what time?   Therefore I voted to reopen my question.  Anyway, I followed the tips to extend the logging with event log. No events of DHCP result changes have been logged, although the DNS lookup changed after some days.


Pagination fault in custom post type archive page

I create ad custom post type  register_post_type( 'videos', $args); and custom taxonomy for that  register_taxonomy( 'video_category_categorie', 'videos', $args );  Maximum number of post displayed is 2 per page. Via word press backend in archive-videos. php i write the for displaying the post from a specific taxonomy ( taxonomy item id is 3  )  $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;  $args = array( 'post_type' => 'videos','paged' => $paged,'tax_query' => array(     array(     'taxonomy' => 'video_category_categorie',     'field' => 'term_id',     'terms' => 3) ));  $loop = new WP_Query( $args ); while ( $loop->have_posts() ) : $loop->the_post(); echo get_the_title().'<br>'; endwhile; twentyfourteen_paging_nav();   Now i get the result correctly only pst from taxonomy id 3 is displayed.  But the pagination is not correct. it  showing 1 2 3 4 . actually there is 5 post that is in taxonomy id 3 . so the correct pagination is 1 2 3 .  And also when clicking  4 page the page didn’t show any post name .  Please help


Is there any Linux command to create a new file in a folder and auto create this folder if not exist?

I know this problem can solve by use combine mkdir and touch commands. But I want to know is there any other solution only use one command.


After posting my question here,   I got no answer so here it is. I have these 2 commands:  xinput --set-prop "Razer Razer DeathAdder" "Device Accel Constant Deceleration" 4                                  xinput --set-prop "Razer Razer DeathAdder" "Device Accel Velocity Scaling" 1     Which I want to run on start up. I am using zsh shell.  I tried putting these 2 commands /etc/rc.local, .zshrc, .zlogin, also in /etc/xdg/lxsession/Lubuntu/autostart , also in /.xinitrc and /etc/X11/xinit/xinitrc but nothing seems to happen. Could somebody let me know what is going on please, and why none of these is working?  Here is my current /etc/X11/xinit/xinitrc file (ignore the numbers (vim)):    1 #!/bin/sh                                                                                2                                                                                3 # /etc/X11/xinit/xinitrc                                                                                4 #                                                                                5 # global xinitrc file, used by all X sessions started by xinit (startx)                                                                                6                                                                                7 # invoke global X session script                                                                                8 . /etc/X11/Xsession                                                                                9                                                                                10 /usr/bin/xinput --set-prop "Razer Razer DeathAdder" "Device Accel Constant Deceleration" 4             11 /usr/bin/xinput --set-prop "Razer Razer DeathAdder" "Device Accel Velocity Scaling" 1     Could somebody explain to me what is goign on ? Why nothing is happening? I tried everything, rebooted, and the $%^&* commands will just not run.  Any help please?


In previous versions of Netbook Remix I was able to disable the netbook-launcher and just have a blank desktop.  I liked the speed of the Netbook version but not the interface, this worked well for me.   How can I remove Unity?  It would also be useful to have removal instructions for all versions of Ubuntu.


Doesn't write the full last name of third author

I have some trouble with my literature directory. It doesn't show the full name of the third author. It only shows:      Hairer, E. und Lubich, C. u. W. G.      But I want to see:      Hairer, E., Lubich, C. und Wanner, G.       My code looks like following:    \documentclass[a4paper,12pt]{article} \bibliographystyle{chicago}   \begin{document}      \bibliography{BIB} \end{document}   And in my Bib the code is  @book{hairer2002geometric,  title={Geometric Numerical Integration: Structure-Preserving Algorithms for Ordinary Differential Equations}, author={Hairer, E., Lubich, C. und Wanner, G.}, series={Springer Series in Computational Mathematics}, year={2002}, volume={31},  publisher={Springer},  address={Berlin}      }


Non-Perfect maze generation with objectives

I need an algorithm that can generate mazes with these requirements:  Allows for random structures to be made (Ex: a center spawn area, objective points and 'Caverns (corridors with 2 or more entrances and a width > 1)' )  Generates paths from structures to required connections  Can be implemented in Python with relatively little difficulty  No extra modules (unless supports Python 3.5.5)   As an example, the objectives would look like this in game (I use integers to store the walls in the ray caster):   2 2 2 2 2 0 0 2 2 0 0 2 2 2 2 2   I also tried looking on  and I found this semi-helpful  but none have helped me achieve this so far.


Passing arguments with spaces and quotes to a script (without quoting everything)

The following works great on the command-line:  $ ffmpeg -i input.m4a -metadata 'title=Spaces and $pecial char'\''s' output.m4a   How do I parameterize this command and use it in a script/function? I would like to add multiple metadata tags like this:  $ set-tags.sh -metadata 'tag1=a b c' -metadata 'tag2=1 2 3'   update:  I simplified my question a little too much. I actually want to call a script that calls a script with with the parameterized command in it.  This is my exact use case:  This function converts files to audio-book format (defined in .profile):  # snippet of .profile convert_to_m4b () {     FILE="$1"     BASENAME=${FILE%.*}; shift      ffmpeg -i "$FILE" -vn -ac 1 -ar 22050 -b:a 32k "$@" tmp.m4a &&     mv tmp.m4a "$BASENAME.m4b" }; export -f convert_to_m4b   Function convert_to_m4b is called from download-and-convert.sh:  #/bin/sh  MP3_URL=$1; shift FILENAME=$1; shift  if [ ! -f "${FILENAME}.mp3" ]; then     curl --location --output "${FILENAME}.mp3" "$MP3_URL" fi  convert_to_m4b "${FILENAME}.mp3" "$@"   Download-and-convert.sh is called from process-all.sh:  #/bin/sh download-and-convert.sh http://1.mp3 'file 1' -metadata 'title=title 1' -metadata 'album=album 1' download-and-convert.sh http://2.mp3 'file 2' -metadata 'title=title 2' -metadata 'album=album 2' ... ... download-and-convert.sh http://3.mp3 'file N' -metadata 'title=title N' -metadata 'album=album N'   I get this error from ffmpeg:  [NULL @ 00000000028fafa0] Unable to find a suitable output format for ''@'' '@': Invalid argument   "$@" works if I inline convert_to_m4b in download-and-convert.sh instead of calling the function.    The following does not work because the quotes are lost, causing arguments with spaces to be incorrectly split up:  #/bin/sh ffmpeg -i input.m4a $@ output.m4a   I have tried various methods of , but this ends up quoting '-metadata' as well, so the command line argument is not properly recognized.  I guess I would like to only surround each argument with quotes if that argument was quoted to begin with. This seems difficult to do because bash strips the quotes before being passing arguments to the script/function.  Or is there a better method of relaying the -metadata arguments? (like environment variables or files)


I sent an email to someone and got an auto-reply saying:     I am out of the office until 09/15/2014.   Does this mean he will be available on the morning of the 15th?


Has anyone here been successfully able to travel by sea from Manila to Taiwan? I read a post and some answers related to this topic that it could be done, but actual practice, I've been to the Manila International Container Terminal to see if I can tag along as a passenger but you can't even get past the main gate unless you are a worker or crew member. I don't think there are any more ferry boats either but if anybody knows of anything currently operational, please advise. Thanks


Why the comma is used in the sentence by Jane Austen

I cannot understand the usage of comma after "chapel" in this sentence:      Its long, damp passages, its narrow cells and ruined chapel, were to be within her daily reach, and she could not entirely subdue the hope of some traditional legends, some awful memorials of an injured and ill-fated nun.   Why is a comma used here, and what is the sentence structure?  The sentence is an excerpt from "Northanger Abbey" by Jane Austen.


MacOS High Sierra: An error occurred while verifying firmware

I have a Mid 2011 iMac currently running MacOS 10.12 Sierra. It’s not my main machine, but I would like to install 10.13 on it.  Updating starts smoothly enough, but when it comes to restarting, I get the following message:     macOS could not be installed on your computer   An error occurred while verifying firmware.   I understand that my Mac is on the edge, but I read that any machine which supports 10.12 will also support 10.13  The iMac is running from an external SSD, due to a problem with the logic board, so I know that I have some problems. The iMac no longer boots from the internal drive (or recognises the DVD), but still works otherwise.  However, the problems don’t seem to be invove the actual firmware, and the iMac is happily running 10.12.  What does this message mean, and can it be resolved?


i am trying to study SQL Injection nowadays & i am searching for good tutorial .   any recommendation for written or videos tutorial ?


numbers of pages don't appear on pdf printed

I created a document in latex. The numbers of pages appears on pdf, but I printed the pdf and numbers don't appear.   Somebody can help me ?  Example of one of my pages:    my preamble code:  \documentclass[12pt,twoside,a4paper,openright]{report} \usepackage{color} \usepackage[portuguese]{babel} \usepackage[utf8]{inputenc} \usepackage[hidelinks]{hyperref} \usepackage[official]{eurosym} \usepackage{gensymb} \usepackage[lmargin=3.0cm,rmargin=2.0cm,tmargin=2.0cm,bmargin=2.0cm]{geometry} \usepackage{fancyhdr} \usepackage{graphicx} \graphicspath{  {fig/} } \usepackage{mathtools} \usepackage[round]{natbib} \usepackage{xr} \usepackage{siunitx} \usepackage{booktabs, multicol, multirow} \usepackage{pdflscape} \usepackage{emptypage} \usepackage{epstopdf} \usepackage{setspace} \usepackage{nomencl} \usepackage{tabularx} \usepackage{amsmath} \usepackage{booktabs} \usepackage{ragged2e} \usepackage{tikz} \usepackage{gensymb} \usepackage{chemformula}  \onehalfspace   \pagestyle{fancy} \fancyhead{} \fancyfoot{} \fancyfoot[RO,LE]{\thepage} \fancyhead[RO]{\slshape \rightmark} \fancyhead[LE]{\slshape \leftmark}  \begin{document} \pagenumbering{roman}  \tableofcontents \listoffigures \listoftables  \cleardoublepage \clearpage \pagenumbering{arabic}  \input{Intro}  \end{document}


Did the Death Star have an external atmosphere?

We know that the Death Star had an internal atmosphere due to the fact that living creatures reside in it without some form of breathing apparatus. We also know that there are at least two forms of vent-like activities performed on the Death Star: the reactor exhaust, and waste dumping. Considering the size of the Death Star, one could reason that a portion of any matter vented or released approximate to the Death Star would be caught by its gravitational pull and retained as atmosphere. Does the Death Star have an external atmosphere? Thanks


Size of array function return size of int instead of array

out put is always 8! I am wondering where this number comes from and how can I get the correct size of the size of the array which is 6?     #include <stdlib.h> #include <stdio.h>  void cal(int a[]) {     printf("the size of array is= %d\n", (int)(sizeof(a)/(sizeof)(int))); }  int main () {     int lis[]={1,2,3,4,5,6,7,8,9};     cal(&lis[3]);     return 0; }


Does the function $f(x) = \frac{x^2-1}{x-1}$ have any point discontinuity?

Since the domain of $f(x)$ is $(-\infty, 1) \cup (1, \infty)$ is there any point discontinuity in $f(x)= \frac{x^2-1}{x-1}$?


How did Sauron remain in control of the Nazgûl?

The One Ring gave Sauron control of the Nine, yet when it was taken from him he still possessed the power to control them (or, at least he regained it towards the end of the third age).  Why is this?   mentions that he drew the Nine to him, but not how.


For an assertion $P(n)$ where $n\ge2$, the following information is given,

This question was a mistake and i Cannot delete it now.


$M_x$ is free $\Rightarrow \widetilde{M}$ is locally free at $x$

Let $X=\text{Spec}(A)$ where $A$ is noetherian. Suppose $M$ is a finitelly generated $A$-module and that $M_x$ is a free $A_x$-module with finite rank for some $x\in X$. Show that there exists an open neighbourhood $U\subset X$ of $x$ such that $\widetilde{M}\big|_U$ is free. [here $\widetilde{M}$ is the sheaf on $X$ defined by $\widetilde{M}(X_f)=M_f$ when $f\in A$]  Suppose $M_x$ is generated by $\frac{m_1}{f_1},...,\frac{m_r}{f_r}\in M_x$ with $m_i\in M$ and $f_i\notin x$. In that case $\frac{m_i}{f_i}\in M_{f_i}=\widetilde{M}(X_{f_i})$. Defining $f:=f_1\cdots f_n$, we have $X_f\subset X_{f_i}$ for all $i$, so we may assume the generators are of the form $\frac{m_i}{f^{k_i}}\in M_f$. I'm trying to prove that $\widetilde{M}\big|_{X_f}$ is free. The fact that $M$ is finitely generated means that there is an exact sequence $A^n\stackrel{\phi}{\to} M\to 0$ where $\phi(a_1,...,a_n)=\sum_{i=1}^na_iu_i$ for some $u_i\in M$. Localizing at $f$, we have a new exact sequence $A_f^n\stackrel{\phi_f}{\to}M_f\to 0$ and an isomorphism $A^n_f/\ker(\phi_f)\simeq M_f$. I really can't see how to prove that $A_f^n/\ker(\phi_f)$ is free, and also why is the noetherian condition necessary. Is there maybe a better way to approach this?


A version of str.isdigit that returns True for decimal fractions?

I want to test raw_input to make sure that the string contains only numbers and at maximum a single decimal point. str.isdigit() looked promising but it will not return True if there is a decimal point in the string.   Ideally, the code would look like this:  def enter_number():     number = raw_input("Enter a number: ")  # I enter 3.5     if number.SOMETHING:  # SOMETHING is what I am looking for         float_1 = float(number)         return float_1     else         sys.exit()  half = enter_number() / 2  # = 1.75 double = enter_number() * 2  # = 7


Proving that there is a bijection between $A$ and $B$.

If we set $A$ and $B$. Assuming that there exist an injective map from $A$ to $B$ and an injective map from $B$ to $A$. How to prove that there is a bijection between $A$ and $B$.


What does Ctrl + Alt + F11 do and why can't I log into my account with Unity any more?

I was just happily typing away, trying out some Android development on my Ubuntu machine. I pressed Ctrl + Alt + F11 instead of Ctrl + F11 to run the program in Eclipse.  This made the screen go blank with a white flashing cursor and it stayed like that for a while, so I pressed Ctrl + Alt + F4 to get to a terminal I could use and remembered seeing somewhere startx to start the GUI again, so I tried that and had something I have also been trying commands like unity, unity start and unity restart, but they all seem to run, but I never get my GUI back.  The fact that it only happened to my user account is strange. If I use guest I can access the GUI, but if I try and log in to my account the screen goes black for a few seconds and then sends be back to the log in screen.  I have tried installing the Xubuntu desktop over the top of it, but it does the same thing with that desktop as well.  My knowledge of Linux is starting to get stretched at this point now.  What may have happened and how do I put it right? Maybe it's a user setting or something I could change?  Also could anyone tell me what Ctrl + Alt and F11 does?  I'm using the latest version of Ubuntu and ran the latest updates today as well.  When running startx, I get an error saying:     Fatal Server error@ server is already active for display 0 if this server is no longer running, remove /temp/.x0-lock and start again   Another thing I have tried is using Ctrl + Alt + F7 to bring back the GUI, but that doesn't seem to help either. It always sends me back to the log in screen (which is the GUI log in screen).


Is it safe to have laptop turned on 24/7?

I have an old HP dv7-7210sp laptop and I want to use it as a server. Is it safe to have it turned on 24/7? The server will be used with Nextcloud to backup my data.  Should I remove the battery from the laptop or keep it as a backup power source?  Also, is it safe to run HDD 24/7 or should I enable APM so it spins down after some time of inactivity?  Can the laptop burn if I leave it running?


A non foreign key field cannot be referenced in a path expression: BH_US_Delivery_Engagement__c

I have a lookup on Veeva events object for delivery engagement with API name BH_US_Delivery_Engagement__c. When I am trying to access it on my code getting the above error. Can anyone help ? Also, PFA the screenshot.


Just trying to run the following code already given in the pyqgis cookbook to create graduated colors symbology (as in example with 2 classes)  I define the source info for the shapefile but when I run execute the code within my test-plugin, it just adds the layer without classifiying. Just adds as usual, all polylines appear same.  Any solution or working code/method?  link to code in cookbook   from qgis.core import  (QgsVectorLayer, QgsMapLayerRegistry, QgsGraduatedSymbolRendererV2, QgsSymbolV2,QgsRendererRangeV2)  myVectorLayer = QgsVectorLayer('C:/my_test_shape_file.shp', 'test_shp_file', 'ogr')  myTargetField = 'target_field' myRangeList = [] myOpacity = 1  # Make our first symbol and range... myMin = 0.0 myMax = 50.0 myLabel = 'Group 1' myColour = QtGui.QColor('#ffee00') mySymbol1 = QgsSymbolV2.defaultSymbol(myVectorLayer.geometryType()) mySymbol1.setColor(myColour) mySymbol1.setAlpha(myOpacity) myRange1 = QgsRendererRangeV2(myMin, myMax, mySymbol1, myLabel) myRangeList.append(myRange1)  #now make another symbol and range... myMin = 50.1 myMax = 100 myLabel = 'Group 2' myColour = QtGui.QColor('#00eeff') mySymbol2 = QgsSymbolV2.defaultSymbol(myVectorLayer.geometryType()) mySymbol2.setColor(myColour) mySymbol2.setAlpha(myOpacity) myRange2 = QgsRendererRangeV2( myMin, myMax, mySymbol2, myLabel) myRangeList.append(myRange2)  myRenderer = QgsGraduatedSymbolRendererV2('', myRangeList) myRenderer.setMode(QgsGraduatedSymbolRendererV2.EqualInterval) myRenderer.setClassAttribute(myTargetField) myVectorLayer.setRendererV2(myRenderer) QgsMapLayerRegistry.instance().addMapLayer(myVectorLayer)      @Kelly's code works perfectly.   However I noticed that both the code (one I have typed in my first message and yours in the 2nd message) DO NOT work in QGIS v1.7.3 but WORKS in QGIS v1.8.0. I think this was a bug(?) that already resolved in v1.8.0  And one more question;  Do you have any sample code for (natural breaks, Jenks) classification of the "numeric_attribute_field" based on given number of classes (i.e. no of classes will be a variable in the code, say "n", and I will pass that from the plugin GUI i.e. n = spinBox.value() )


Strategy for the Limit: $\lim_{n\to\infty} \frac{2^{n+1}+3^{n+1}}{2^n+3^n} $

I do not understand how to properly solve this limit:  $$ \lim_{n\to\infty} \frac{2^{n+1}+3^{n+1}}{2^n+3^n} $$  I thought of breaking it up:  $$ \lim_{n\to\infty} \frac{2^{n+1}}{2^n+3^n} +\lim_{n\to\infty} \frac{3^{n+1}}{2^n+3^n} $$ But I do not see how this will allow me to use any of the limit rules to reduce. I know that the series converges though.   Thanks.


I have an armature set up, but the bones aren't moving the mesh properly  The mesh and armature:    The vertex group of the bone I am going to move:    As you can see, the circled region doesn't belong to the vertex group. But, when I move the bone look what happens:    That part of the mesh has moved with the bone.. Why?


SE Election ballots with unexpected values

In exploring the ballots available for download from Stack Exchange elections, the Code Review community came across some unexpected values in the ballot data. Background First, the specification, as far as we can tell, for the *.blt file indicates that each ballot line indicates a weight/count, and then the id's of the candidates that were part of that ballot, followed by a 0. For example, an entry: 1 7 4 9 0  would indicate 1 vote for first-choice candidate 7, then 2nd choice candidate 4, and third-choice candidate 9. The evidence for this specification comes from two places. Here, . A second reference is  I am uncertain of how official that reference is, but it agrees with Jeff. What is clear is that if a voter only chooses a subset of the available candidates, that their ballot will be 'shorter' than other ballots. For example, in Jeff's answer, there is the data: 1 1 4 2 3 0  # The first number is the ballot weight (>= 1). 1 1 2 4 3 0  # The last 0 is an end of ballot marker. 1 1 4 3 0    # Numbers in between correspond to the candidates 1 3 2 4 1 0  # on the ballot. 1 3 4 1 2 0 1 3 4 1 2 0  # Chuck, Diane, Amy, Bob 1 4 3 2 0 1 2 3 4 1 0  # last ballot  The 3rd and 7th lines indicate ballots which do not have a full complement of candidates voted for. Herein lies the problem. In the SE election data, there are 'occasional' references to candidate 0, who does not exist, and should not exist. Here are the first 10 or so "odd" ballots  ( and more than 27,000 ballots in total): 27: 1 0 7 0 0 384: 1 0 9 2 0 498: 1 0 4 7 0 508: 1 0 4 0 0 833: 1 3 0 5 0 964: 1 0 8 0 0 970: 1 1 0 9 0 1016: 1 10 0 9 0 1103: 1 5 0 6 0 1230: 1 0 5 0 0 ....  The number before the colon is the ballot line number from the above file/dataset () Questions Given the above, it is somewhat logical to assume that the odd-valued ballots are a result of voters not choosing all of the 1st, 2nd, and 3rd choice candidates. I.e. a voter who only selected a 2rd-choice candidate (candidate 5) may have a ballot like 1 0 5 0 0 While that is a logical assumption, it is also non-conformant to the specification. That vote should be registered as 1 5 0  So, is our assumption correct that the system is producing a 'bad' file for some votes as a result of not choosing all candidates?  If not, why are there 0-values in the candidate-space for ballots?  should the ballot system be audited to ensure that votes are not being 'spoiled' inadvertently (i.e. are we sure that the OpenSTV tool can handle this "bad data" appropriately)?


Property relationg to non-ableian group $G$

If $G$ is a group in which $(a\cdot b)^i=a^i\cdot b^i$ for three consecutive integers $i$ for all $a,b\in G$, show that $G$ is abelian. Show that the conclusion of above problem does not follow if we assume the relation $(a\cdot b)^i=a^i\cdot b^i$ for just two consecutive integers.   I have solved the first spending about 3-4 hours. However, I cannot come up with the example to problem 2.    Can anyone please help with that?


Why it is not possible to call a static function defined within a class through reference variable of the class?

I have a question that why this code is giving me an error while i am trying to call a static function defined within a class through a class reference and it makes possible to call a static function when i am creating an object of a reference.  public class Example { public static void main(String args[])   { Example t; t.method();//getting error Example t1=new Example t1(); t1.method();//it runs successfully } public static void method() { System.out.println("NullPointerException"); } }


How to add unnalocated space to Linux partition?

Please have a look at the screenshot below. All I have to do is to merge the unallocated space (10.42 GB) to my Linux partition sda3 due to low disk space. I tried to resize the sda3 partition but I cannot do so. Please guide me step by step to do this. If I do by myself, I may lose data. Seeking advice from experts. I'm not familiar with merging partition and all. Please help me. Thanks.  Edit: I have to merge the partition sda3 to the unallocated space (10.42 GB). Tried GParted in Live boot, but failed to resize partition.


Limit of a sequence $a_n = \sqrt[n]{n!}/n$

Find the limit of the sequence  $$a_n = \frac{\sqrt[n]{n!}}{n}$$  I can figure out the limit of the sequence by letting $n=1,2,3,\dots$ but what would be the more conceptual approach to finding the limit?


How to choose the right CPU for a web server

How can i choose the right CPU for a site that runs on two servers, a web server (Apache worker MPM) and a database server (MySQL). The website is written in PHP-Mysql, with no PHP caching (as required by the owner) and it has heavy traffic (avrg concurrent users 3000~ and avrg transactions per second 7000~)  I got two options for example: 2x Octo-Core E5-2650 2.0 Ghz w/HT 32 Threads or a single Intel Xeon E3-1270V3 3.5Ghz. I have looked up the specifications of both of them and i see that the first one exceeds the second one in everything except the clock speed, What should i be looking at ?  Note: I have asked this question before a couple of days and deleted it because one of the dedicated servers providers refused to share the full CPU information, i am re-posting this after having the complete CPU specifications.


As a user signing up to reward a user for their answer found via Google; Is earning 15 rep necessary before being allowed to?

I found a very elegant answer to a question and considered signing up to let the user know they helped me by giving an up vote. After considering my signup options I was about to skip signing up but I that I really wanted to let this user know they had really helped me out.  Upon attempting to give an up vote or even a comment I was blocked as messaged popped up letting me know I did not have enough reputation.  I understand rep is a large part of this website but when a user signs up to honestly reward someone (after considering not signing up) maybe the barrier for entry is a little high?


Let $f:\mathbb R \to \mathbb R$ be a twice continuously differentiable function, with $f(0)=f(1)=f'(0) = 0$. Then   $f^{"}$ is the zero function. $f^{"}(0)$ is zero. $f^{"}(x)=0$ for some $x \in $ (0,1). $f^{"}$ never vanishes.   I don't know where to start, tried rolles theorem but cant catch the point..please help me to start..


What is the shape of a rope hanging from two ends?

If I hang a rope from two points that are at the same height above the ground, what is the mathematical function that describes the shape of the rope between the two points? Assuming the mass of the rope is evenly distributed between the two points.  Upon visual inspection, it appears to be parabolic, but looks can be deceiving. I want to be able to calculate how much rope I'll need to span the distance, assuming that I want it to sag by a given amount. If I know the function of the rope's shape, I think I can use an integral to calculate the length of the curve.


Is there a way to fit table cells to their content? (InDesign)


PHP session IDs -- how are they generated?

When I call session_start() or session_regenerate_id(), PHP generates what appears to be a random string for the session ID. What I want to know is, is it just a random sequence of characters, or is it like the uniqid() function?  Because if it's just random characters, couldn't you theoretically run into a conflict? If User A logged in and then User B logged in and, though highly unlikely, User B generated the same session ID, then User B would end up accessing User A's account.  Even if PHP checks to see if a session with the same ID already exists and, if so, regenerates an ID again... I don't think I want a system that EVER produces the same ID twice, even after garbage collection -- maybe I want to store a table of them and check against them for possible hijacking or whatever.  If it isn't unique, how should I go about enforcing uniqueness? I'd rather implement it using PHP configuration than in every script I make. Nice thing about PHP sessions is not worrying about the technical details behind the scenes.


Looking for an application that will provide image matches on local machine

I've found a bunch of programs that will spit out a list of duplicate images. In other words, you click "Go" and it looks at everything on a drive, or in a folder, and tells you if there are any duplicates. I'm looking for an application that will let me identify a specific image and search for matches to that image. In other words, I'm looking for the functionality of TinEye, but in a package that will search my local machine or network.  EDIT: I started my search in the other thread listed. Those are the applications that appear to be meant to find duplicate images, presumably so they can be erased to free to disc space. I could use that for what I'm trying to do, but with tens of thousands of images it would mean turning a task that should take a few seconds into one that takes a few hours. What I'm looking to do is select a single image and find other instances of that single image, on my C: drive or network. If anybody knows those other programs and thinks I've missed the boat on them, please point me in the right direction.   Any ideas?


I recently found the plans for a  that requires .  Where can I find that legendary crafting material?


Username on wiki answer differs from the current username

I found the  on Meta Stack Overflow on Russian where username contains the old name (I think that it was on the posting time):        But the current username in the profile page is not "Squidward", but "Athari" as you can see by clicking the :          Same issue on MSE . Author is marked as Sam Saffon:        But the link refers to


windows runas command with elevated privileges, user in admin group

I have a windows 7 user who belongs to admin group. I want to execute sc command that requires admin privileges. I DON'T want to open an elevated cmd, want to be able to simply Win+R->Enter command, enter password and that's all. I tried the runas command, but it doesn't seem to work:  >runas /user:me "cmd"   and it asks for a password, and then the command is executed with normal privileges. I know I could use /user:administrator but I don't know the admin pass and I think the admin user (me) should work.


Please let me know if could in the following sentences shows a hypothetical situation or possibility.   He couldn’t lift that. It’s too heavy. He could lift that. It is not too heavy.


Sorry for the newbee question... But that did somehow work a few days ago, but not now anymore... But I really don't know what I've changed...  Biblatex Version: 3.7 Biber Version 2.7  I have a folder Structure like:  threads.tex include |--> literatur-datenbank.bib |--> multiple other files   A Sample from my datenbank-literatur.bib looks like this:  @Book{rauber,   Title                    = {Multicore: Parallele Programmierung},   Author                   = {Rauber, T.},   Year                     = {2008} }   my Threads.tex looks like that:  \documentclass[a4paper,fontsize=11pt,oneside,parskip=half,headings=normal]{scrreprt} \input{includes/_praeambel.tex}  \bibliography{includes/literatur-datenbank} \begin{document} . . .   Log File loks like this:  . . . Package babel Info: Redefining ngerman shorthand "~ (babel)             in language  on input line 4.  LaTeX Warning: Citation 'rauber' on page 2 undefined on input line 5. . . .


I have issues with updates for the OwnCloud desktop release:  teddy@Yoga-2:~$ sudo apt-get update --allow-unauthenticated [sudo] password for teddy:  Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease Ign:2 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  InRelease Get:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [94,5 kB] Get:4 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release [1023 B] Get:5 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release.gpg [189 B] Ign:5 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release.gpg Hit:6 http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Packages Hit:7 http://archive.ubuntu.com/ubuntu xenial-backports InRelease Get:8 http://archive.ubuntu.com/ubuntu xenial-security InRelease [94,5 kB] Get:9 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [242 kB] Get:10 http://archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [238 kB] Get:11 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [130 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [127 kB] Fetched 927 kB in 0s (1111 kB/s)                           Reading package lists... Done W: GPG error: http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 977C43A8BA684223 W: The repository 'http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_15.10  Release' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details.   This is no the first time I have issues updating Ownclous but this time I cannot resolve this. Can you please help? How do I authenticate explicitly the repo? P.S. Adding the GPG key as suggested does not resolve the issue. I remember adding it when installing the client.


I do not manage to install QGIS on my windows 10 machine using the osgeo4w installer.  During the installation I get this message:   At the end of the installation I get this message:   And when I subsequently try to run QGIS, I receive this message:    Similar issue can be found in various fora, but none of them provides a conluding answer or did help me to solve the problem.  Any propositions?


SVD: How to find the columnvector of U corresponding to a singular value equal to zero

The question is if you have a situation where one of the singular values is equal to 0 in a singular value decomposition of a matrix, how to do you procede to find the column vector of U corresponding to this singular value?   Usually I found the columns of U with this relation, so let's say that we refer to $\vec{u_2}$ as the U column vector corresponding to singular value equal to 0:  $\vec{u_2} = (1/s_2)Av_2$  Now the as we can see the 0 is in an illegal place, since you can't divide by zero. But if you move it to the left side, I still can't quite see how to find the column of U corresponding to it. Any suggestions?  Here is an example of a matrix that provided this specific challenge  $ A = \left(\begin{array}{rrr} -3 & 1 \\ 6 & -2 \\ 6 & -2 \end{array}\right). $  $ \lambda{_1} = 90$,  $\lambda{_2} = 0$,  $s_1 = 3 \sqrt{10}$,  $s_2 = 0$,  How can one find $\vec{v_2}$ when $\lambda{_2} = 0$? In this case, you know that the eigenvectors of $A^{t} A$ are orthogonal, solve for $\lambda{_2}$ and find the eigenvector if it's orthogonal to the eigenvector corresponding to the first eigenvalue you have your solution.  So we end up with the following normalized column vectors for V, which we can see are orthogonal:  $ \vec{v_1} = \left(\begin{array}{rrr} -3/\sqrt{10} \\ 1/\sqrt{10} \\ \end{array}\right). $  $ \vec{v_2} = \left(\begin{array}{rrr} 1/\sqrt{10} \\ 3/\sqrt{10} \\ \end{array}\right). $


After the most recent miktex update, the following code will not compile with lualatex:  \documentclass{article} \usepackage{fontspec} \begin{document} test \end{document}   The same error happens if I load the package luaotfload. On the other hand, if I don't load the fontspec package (or luaotfload), then it compiles fine with lualatex. So it seems there's some conflict there. Here's the error I'm getting:  FATAL ERROR Luaotfload requires a Luatex version >= 0.95.0. Please Update your Tex distribution!  ...les/Miktex 2.9/tex/luatex/luaotfload/luaotfload-main.lua:36: version check failed stack traceback: [C]: in function 'error' ...les/Miktex 2.9/tex/luatex/luaotfload/luaotfload-main.lua:36: in main chunk [C]: in function 'require' [\directlua]:1: in main chunk. 1.49 }   I've updated Miktex and verified that I'm running LuaTex, Version 1.0.0 (MiKTex 2.9.6100 64-bit). Many thanks in advance for your help.


LWC Component Tabs are not getting refresh, when moving back and forth on different tabs in the Lightning App

I created an LWC component with lightning-radio-group and added it to the Lightning App, it only shows which value is selected by the user. As I selected value and move the back and forth on the tabs of the same application and when I came back to the LWC component tab, it shows the same selected value. The tab should refresh. I am also attaching a video with this issue. Video Link:-  CODE HTML <template>     <lightning-card title="Radio Group in LWC">
             <lightning-radio-group label="Account Type"                                      name="radioButtonGroup"                                      onchange={handleChange}                                      options={options}                                     value={selectedValue}                                     type="radio"></lightning-radio-group>

                 Selected Value: {selectedValue}

      </lightning-card> </template>  JS import { LightningElement, wire, track} from 'lwc'; import { getPicklistValues } from 'lightning/uiObjectInfoApi'; import { getObjectInfo } from 'lightning/uiObjectInfoApi'; import ACCOUNT_OBJECT from '@salesforce/schema/Account'; import Type_FIELD from '@salesforce/schema/Account.Type';  export default class RadioButtonsInLWC extends LightningElement {     @track selectedValue;     @track options = [];      // object info using wire service     @wire(getObjectInfo, { objectApiName: ACCOUNT_OBJECT })     objectInfo;      // Getting Account Type Picklist values using wire service     @wire(getPicklistValues, { recordTypeId: '$objectInfo.data.defaultRecordTypeId', fieldApiName: Type_FIELD})     typePicklistValues({error, data}) {         if(data) {             let optionsValues = [];             for(let i = 0; i < data.values.length; i++) {                 optionsValues.push({                     label: data.values[i].label,                     value: data.values[i].value                 })             }             this.options = optionsValues;             window.console.log('optionsValues ===> '+JSON.stringify(optionsValues));         }         else if(error) {             window.console.log('error ===> '+JSON.stringify(error));         }     }      // handle the selected value     handleChange(event) {         this.selectedValue = event.detail.value;     } }


Windows 10 can not search anything from start menu after I renamed my users folder

I installed windows few days ago and set user name as [FirstName] [Last Name], some commands had problems to execute from CMD because my username had space in the middle. I logged in using administrator and renamed the folder to [My Nickname], after that I'm geetting error that setup can't find directory C:\Users\[First Name] [Last Name]\... and when I try to search from start menu, it's not able to find anything any ideas?


How to retrieve a Pokémon Go account when you log in and it tells you to start all over again

Hi so I have an account and so does my sister.I logged out to play for her but when I tried to log back in it made me start from scratch (choose character, a starter, and a name) Is there a way I can get my account back it was level 10 so I don't want to restart  IT IS NOT A REPETITION OF   It is not a repetition because that is asking if you can log back in to play and the answer is yes but I logged in and I had to restart from zero so I'm asking how to get my level 10 account back


Initializing function pointers in struct

typedef struct foo{     void (*del)(void *toDel);     char* (*p)(void *tp) } Foo;  Foo init(char* (*print)(void*),void (*delFunc)(void*));   Trying to figure out how to assign or initialize the supplied parameters to the struct function pointers.


Ansombe-quartet-like (pedagogical) examples to demonstrate power of visualizations

The Anscombe Quartet powerfully makes the point about the effectiveness of a visualization.  Do people have other (pedagogically tested) vignette/dataset examples, especially based on economic/business data, for which using the right visualization helps the analyst gain unique insights about patterns in the data?


When partially beheaded, does an Ettin retain full control of its body?

There are more then a few sources which depict two-headed humanoids (such as ettins) having more control over some limbs than others - the left head uses the left arm to punch the right head, and such. If an Ettin was to lose one head, would it lose control of the arms that were primarily controlled by that head?   To put it another way: Let's say the ettin's left head controls the left leg and arm, and the right head controls the right leg and arm. The two normally work in tandem to function. However, let's now say the left head is decapitated. Would the right head lose control of the left arm and leg? Or would it "inherit" control of those limbs from the left head, resulting in the Ettin still be able to function fully? I mean, I'd assume both heads share the same nervous system to some extent, but would the left head's nervous system extend to use both arms when one head dies?


Extracting two lines if pattern exist in the second line + clean + remove duplicates (Whatsapp extraction)

I want to search through a WhatsApp conversation (dumped as txt file) for any message containing  the string "I will tell to your mom" as well as the message before it.  However, I need to be able to match variations of the search string such as:  - tell to your mom !!  - teLl to Your Mom !!!!!!   Those should also be considered the same if same wording appears in the line before.


complex structure compatible with symplectic form and riemannian metric

Given a non-degenerate symplectic form $\omega$ on a finite dimensional vector space $V$ and a complex structure $J$ (that is, $J\in End(V),~J^2=-Id$). If $J$ is compatible with $\omega$ in the sense that $$\omega(Jv,Jw) = \omega(v,w),~ \omega(v,Jv) > 0,$$ then we can define a positive definite inner product by setting $$g(v,w) = \omega(v,Jw).$$ Then $g$ is also Hermitian in the sense that $$g(Jv,Jw) = g(v,w).$$  Question. Now suppose we start with a symplectic form $\omega$ and a positive definite inner product $g$, under what conditions does there exist an almost complex structure such that $\omega$ and $g$ are related by the above equation? And how does this correspond to the linear algebra statement that $$U(n) = GL(n,\mathbb{C})\cap Sp(2n,\mathbb{R})\cap O(2n).$$  It is a standard fact that given a metric $g$, there exists a canonical $J$ compatible with $\omega$, but the problem is that the $J$ so found need not satisfy $$\omega(v,Jw) = g(v,w).$$


Confusing article status for journals of American Mathematical Society: "reviewing" AND "being handled by an editor"

The web page of my article in the AMS editorial system for some three months says "Article status: Reviewing" and in the next line "Your paper is being handled by an editor". I find this confusing as the "reviewing" status appears to suggest that the article is with the referee(s) rather than with the editor but this in turn seems to contradict the line "Your paper is being handled by an editor".  Could someone with enough experience with AMS journals please explain how should one interpret the combination of "Article status: Reviewing" and the line "Your paper is being handled by an editor" at the article page? More broadly, which are the possible article statuses in the AMS editorial system?  Many thanks in advance.


Is there an way to avoid this behavior of the pictures    This is have is wrap the picture:  \begin{wrapfigure}{r}{0.5\textwidth}  \vspace{-20pt}   \begin{center}     \includegraphics[width=0.4\textwidth]{./pictures/DBuserTabel.png}%{./Pictures/mainscreen1.png}     \caption{Uklip af User tablen i Databasen}     \label{fig:databaseUserTable}   \end{center}   \vspace{-20pt}   \vspace{1pt} \end{wrapfigure}


In tikzmath the "random" puts ".0.0" if want negative random number

Here is a MWE:  \documentclass{article} \usepackage{pgf} \usepackage{pgfplots} \usetikzlibrary{math} \begin{document} \tikzmath{   int \foo;   \foo = random(-16,10);   print {Foo value: \foo.}; }  \tikzmath{   int \foo;   \foo = random(2,10);   print {Foo value: \foo.}; } \end{document}   Please note the beginning of first line. Is this behavior normal?


When a common noun is used as a proper noun or given as a title to a person or place should it be preceded by an article? If yes, with which article?  For example:     Rahul is called king of good times    or:      Rahul is called a king of good times    or      Rahul is called the king of good times.


Serving static resources at /static/* context while keeping my servlet handling /* context

My problem is simple. I want to have my static resources served at /static/* context, but my specific servlet serving /* context. Since /static/* is a subset of /* it does not work. My web.xml looks like this:  <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  <display-name>template-guice-jersey-tomcat</display-name>  <session-config>      <session-timeout>30</session-timeout>  </session-config>  <welcome-file-list>      <welcome-file>index.jsp</welcome-file>  </welcome-file-list>   <!-- set up Google Guice Servlet integration -->  <filter>     <filter-name>guiceFilter</filter-name>     <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>  </filter>  <filter-mapping>     <filter-name>guiceFilter</filter-name>     <url-pattern>/*</url-pattern>  </filter-mapping>   <servlet-mapping>                                                                                <servlet-name>default</servlet-name>                                                                                <url-pattern>/static/*</url-pattern>                                                                                </servlet-mapping>                                                                                <listener>                                                                                <listener-class>de.danbim.templateguicejerseytomcat.GuiceServletConfig</listener-class>                                                       </listener>                                                                                </web-app>


Can not download VLC using Ubuntu Sofware Center

I am trying to install VLC from Ubuntu Software Center on Ubuntu 14.04. It always says that it failed to download the package and that I have to check my internet connection. I have no problem with my internet connection. Just before I tried to install VLC, I had installed other packages. I tried then " sudo apt-get update " and "sudo apt-get install --fix-missing", but the problem is sitill unsolved. What is the problem, and what are the possible solutions?


I wanna run a servlet application on my tomcat8.5 which is running on my centos server. Maybe its important to know that my app doesn't use a web.xml. I get this exception:  java.lang.NullPointerException     javax.imageio.ImageIO.write(ImageIO.java:1538)     com.google.zxing.client.j2me.MatrixToImageWriter.writeToPath(MatrixToImageWriter.java:99)     com.google.zxing.client.j2me.MatrixToImageWriter.writeToPath(MatrixToImageWriter.java:81)     com.paipai0.Pai.testEncode(Pai.java:107)     com.paipai0.Pai.doGet(Pai.java:67)     javax.servlet.http.HttpServlet.service(HttpServlet.java:635)     javax.servlet.http.HttpServlet.service(HttpServlet.java:742)     org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)     org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)   Note The full stack trace of the root cause is available in the server logs.


Why aren't tables in posts supported via markdown or as raw html?

Wanting to display information in a table is not that uncommon, particularly so for SQL questions on stackoverflow (SQL deals with tables of data).  There is support for tables in various markdown libraries, and it's pretty straightforward, so:   Why can't we just support it? What's the big deal? If there is a good reason, why can't the <table> tag (and the various row/column tags) be allowed as raw html?     Related questions, but not duplicates IMHO because there doesn't seem to be a good reason put forward for "why not":


What is an intuitive explanation of the combinations formula?

I perfectly understand the permutations formula i.e. if you have $n$ things how many ways can you rearrange it if taken $k$ at a time (or if you have $k$ slots)? So you draw the following tree. And the formula comes out naturally. $$^nP_k = \frac{n!}{(n-k)!}$$  I get that it is including all of the duplicates, too. And to get rid of them we use the combinations formula: $$^nC_k = \frac{n!}{k!(n-k)!}$$ Can somebody explain why we have to divide by the "number of ways to re-arrange the slots" to get rid of the duplicates? I understand that it works and the division is used to scale a number down but I am not getting that "aha moment" of why we do it. Can somebody explain it?


Is there any process to prevent the abusing of close on-hold?

Five closing requests are placed on my question about Eclipse passing variable to external tool (), because obviously they cannot understand it.  I got so upset that I examined answer history of every these five users, except one user, other of them had never answered one single Eclipse question. So that I believe it is a case of abusing. It hurts my feeling about the quality of this community.   I'm not asking why it is on-hold or how to re-open it!


If a thrown weapon has only normal range, does it have unlimited range?

As i was reading the Soulknife Rogue feature "Psychic Blades" from Tasha's Cauldron of Everything:  ...This magic blade is a simple melee weapon with the finesse and thrown properties. It has a normal range of 60 feet and no long range, and on a hit, it deals psychic damage equal to 1d6 plus the ability modifier you used for the attack roll. The blade vanishes immediately after it hits or misses its target, and it leaves no mark on its target if it deals damage.  Following that, i look at the PHB for the rules on range for weapons:  A weapon that can be used to make a ranged attack has a range shown in parentheses after the ammunition or thrown property. The range lists two numbers. The first is the weapon's normal range in feet, and the second indicates the weapon's long range. When attacking a target beyond normal range, you have disadvantage on the attack roll. You can't attack a target beyond the weapon's long range.  So, the psychic blades from the Soulknife have unlimited range but with disadvantage or only can attack on the normal range?


When someone leaves a comment that involves you being notified, you get the notification both on the main toolbar on Stack Exchange and as a notification/badge on the iOS app.  If you read a comment on the website and cause the notification to be removed from the toolbar, the badge also gets removed from the iOS app.  However, when a comment that has previously caused a notification/badge to appear on iOS gets deleted, the badge remains on the iOS app while the notification gets removed from the website toolbar.  Could the badge also be removed from the iOS app in this situation?


Under New Management - How do I get the One with the Shadows achievement?

I've completed all the side quests and main quests for the guild but still haven't received the achievement for returning the thieves guild to its former glory.  When I try to speak to Brynjolf he just keeps saying "sorry lad I've got important things to do"  Any ideas how I can get this achievement?


Find multiple blank lines in Notepad++ and join the separated text lines

How to find multiple blank lines in Notepad++ and join the the separated text lines with a macro?  Below is screenshot of the file, where I want a macro to find out this blank line and correct the SEE and FIGURE should come to one line.


What's the difference between a keystore and a truststore?


Was Arcanine originally intended to be a Legendary Pokemon?

In   it was repeatedly suggested that Arcanine was intended to be a Legendary, hence being included in the tablet with the birds and the weird Pokedex entries. The only hint of this in Gen 1 is it's category ("Legendary") but these appear to be more like descriptors of the Pokemon, rather than classifications (the other Gen 1 Legendaries do not have the category "Legendary"). The Pokedex entries up to Stadium are as follows.  Red and Blue: A Pokémon that has been admired since the past for its beauty. It runs agilely as if on wings. Yellow: A legendary Pokémon in China. Many people are charmed by its grace and beauty while running. Stadium: A Pokémon whose beauty is legendary in China. It is said to run gracefully and lightly, as if it were flying.  It seems like there are two possible explanations.  It was not intended to be Legendary, but the makers of the anime misunderstood the category and so included Arcanine in with the actual Legendaries (the Birds and Mew/two). In Yellow onwards GameFreak made sure to clarify that it was more like a historically worshiped/popular Pokemon in China, rather than an actual Legendary. It was originally intended to be Legendary, but this was removed from Gen 1 at the last minute and remnants of this can be seen in the anime.  Do we have any confirmation of either of these explanations from GameFreak/Nintendo/the makers of the anime? Or is there another explanation that has evidentiary support?  This question is about the original intent of Arcanine, not . The accepted answer to that question simply points to an earlier shot of the anime, says "to match this" (which is technically correct) and then reiterates the claim that my question is asking about. My question is about the claim itself and whether any support for it exists.


I want to ask, is it possible to change camera focus in Blender? For example, I want the camera to focus to an object. So the other objects behind the focused object have a blur effect. How to do that? Thanks for the reply :D


Shell script error (: not found [No such file or directory])

I'm using following script on linux server. And which is giving:  : not found [No such file or directory]   This is the script:  # ------------------------------------------------------------------ # K.Sugunan Host health check #           Description # #           This script to initiate health check on servers. #           It will check for CPU, memory and some connectivity with  #           up stream and down stream system. # # ------------------------------------------------------------------  # Applying initial variables and loading config parameters DOCROOT=$(pwd)"/" TIME_NOW=$(date +"%Y-%m-%d %H:%M:%S")  echo $DOCROOT  . $DOCROOT"config/main.sh" . $DOCROOT"config/web.sh" . $DOCROOT"config/telnet.sh"  echo $CPU_A   The error will be like follows:  : not found [No such file or directory] : not found [No such file or directory] /home/sugunan/phobos/ : not found [No such file or directory] : cannot open [No such file or directory]os/   I use following ways to run the script  ksh poc.sh sh poc.sh ./poc.sh   All of the above giving similar error. Even I include #!/bin/bash still the error exist. I have tried #!/bin/ksh and #!/usr/bin/ksh also. All of that gives the error. What may be the reason for the issue on this server?


nohup tensorflow_model_server \   --rest_api_port=8501 \   --model_name=fashion_model \   --model_base_path="${MODEL_DIR}" >server.log 2>&1   I saw this in tensorflow serving guide . I want to know the meaning of > server.log 2>&1. I kind of know that it's about saving stdout to a file, and saving stderr to another file which I don't know what it is.


Here's my sample code :   \documentclass[a4paper,12pt]{article} \usepackage{amsmath} \begin{document} \pagenumbering{roman} \section*{Problem 1} Given that : \\ $$ x \epsilon \mathbb{R} (3,2) $$ \end{document}   I get the following compilation error when using overleaf :  Undefined control sequence. l.19 $$ x \epsilon \mathbb                           {R} (3,2) $$   How could I fix this ?


Unix - Delete folder with strange characters using inode or similar

I want to remove this folder :  Name Name 1x05 name FormaciÃ³n  I have tried all I have seen on internet :   find -maxdepth 1 -inum INODE_NUMBER -exec rm -i {} \; rmdir: wrong deleting './Name Name 1x05 name FormaciÃ³n': don't exist file or folder   Too I tried to use mc (Middnight Commander) , Krusader and any other methods I have seen on internet.  But is not posible. Give this problem.  We can enter in folder and to rename parent but we can't rename or delete this folder.  The problem is because is a folder with spaces and wrong chars and is not posible to change it. You can enter on folder but you can't remove or rename.  So is not duplicated. There is not any solution for this case on StackSchange.   I think the only solution would be edit directly inode to make renaming and be able to remove later, but I don't know how to do on Unix system.  System is Ubuntu but I suppose would be in any other system.  Any method to delete this folder or to edit directly folder name ?  Thanks.


How to see CPU and memory usage for a program after running it

I wrote a shell script and run it with terminal. The script calls other programs and so has some child process.  How can I see TOTAL memory and CPU used for that script after running it ?  more generally : how can I see CPU and memory usage for a program after running it?


I know that my title was not very clear, but I do not know of any other way to describe this. I want to be able to write the following, and be able to change what letters are below the arrow:  Note: I have never used LaTeX, but the text editor that I am using supports it, and it seems to be my best bet. However if there is a better way to do it, I am not committed to LaTeX in any way.


How to solve VERR_NOT_SUPPORTED on VM player for Ubuntu 17.04

I have a 64 bit PC and I downloaded ubuntu-17.04-desktop-amd64 and then I tried to make a Ubuntu VM using Ubuntu 17.04 but is is giving me an error it says failed to open disk image here is the trace back.  Could not get the storage format of the medium 'C:\Users\User\Downloads\ubuntu-17.04-desktop-amd64.iso' (VERR_NOT_SUPPORTED).  Result Code:  VBOX_E_IPRT_ERROR (0x80BB0005) Component:    MediumWrap Interface:    IMedium {4afe423b-43e0-e9d0-82e8-ceb307940dda} Callee:       IVirtualBox {0169423f-46b4-cde9-91af-1e9d5b6cd945} Callee RC:    VBOX_E_OBJECT_NOT_FOUND (0x80BB0001)   Any help?


With a two-dimensional, take $(2, 1)$ as the center point and consider a transformation with a rotation angle of $45^\circ$, then point $(3, 3)$

Then point $(3, 3)$ transformed into what point?  I couldn't solve this problem, I need step by step solution to understand and learn. Does it matter two dimensional or three dimensional? What if rotation angle other than $45^\circ$.?


Alternative for mysql_real_escape_string in mysql?

DESCRIPTION  I want to be able to eliminate special characters in mysql. I WAS using mysql_real_escape_string but I was told it was not correct, and soon to be discontinued   Question  What is an alternative for using mysql_real_escape_string in my case below? Or is there another approach?  ISSUE  I am parsing CSV form URL, and creating INSERT statements.  In my case I'm reading in data from an CSV via URL, examples online don't take into account $f_pointer.  Here is an example of one of data lines to insert:  Note: the ' in Green's Mill is causing the issue.  INSERT INTO scores(place,person,score,grade,round,location)values('-','Alex','2','5','','Green's Mill')   My Failed Approach for solving the ISSUE:  I was using mysql_real_escape_string - clearly badly   SCRIPT - Parse Data & Create Insert   <?php  $servername = "localhost";   $username = "root"; $password = "XXXX"; $dbname = "player";   // Create connection   $conn = new mysqli($servername, $username, $password, $dbname);          $f_pointer=fopen("compress.zlib://https://www.url.com/api/v2/projects/xxxx/last_ready_run/data?api_key=xxx&format=csv","r");   $sql = "TRUNCATE TABLE scores";  $conn->query($sql);        if ( $f_pointer === false )         die ("invalid URL");     $ar=fgetcsv($f_pointer);    while(! feof($f_pointer)){         $ar=fgetcsv($f_pointer)  ; $sql="INSERT INTO    scores(place,person,score,grade,round,location)values('$ar[0]','$ar[1]','$ar[2]','$ar[3]','$ar[4]','$ar[5]')";  $conn->query($sql);    echo $sql;  echo "<br>";      } ?>   OUTPUT RESULTS  Fails to insert because of the special character ' in the location field.  DESIRED RESULTS  INSERT INTO scores(place,person,score,grade,round,location)values('-','Alex','2','5','','Greens Mill')   Note: Green's Mill would needs to be Greens Mill without the '.


can anyone explain why I cannot change the background of an appended element? Thank you so much. (I could not submit the question without writing more text so I am writing more text.)  <!DOCTYPE html>      <title>TEST</title>                      <button>add div</button>


Evaluate $\lim_{x \to 0} (x\lfloor\frac{1}{x}\rfloor)$  I'm trying to solve it by using the squeeze theorem but I'm stuck.  I'm looking for a function $g(x)$ such that $g(x) \leq x\lfloor\frac{1}{x}\rfloor \leq x(\frac{1}{x}) = 1$  Can anybody give me a hint?


What is the current 'standard' for modern statistical computing hardware?

I am in the market for a new system (probably a laptop) that would be be used primarily for Bayesian/MCMC analyses.  If I had unlimited funds I would obviously buy very high end hardware and be done with it.  Unfortunately, this is the real world and I have to make my budget stretch.  I am looking for advice about the type of system I should get particularly in terms of processor(s) and amount of RAM.  Please note that I am not looking for specific recommendations regarding RAM and processor.  I am looking for general guidance about how to financially prioritize the various aspects of the computational hardware.  I am fine with a PC or a Mac.  If it is relevant, most of my computations would involve running R and/or C.


UK visitor visa requirements for a self-employed father and employed mother visiting their son in the UK?

My parents intend to visit my brother, who is working in the UK (living in his own property). I too plan to accompany my parents. At present, my parents and I live together in the Middle East. I am employed, as is my mother, although my father is self-employed.  We recognise the need of fulfilling specific conditions to be able to acquire a UK visit visa, such as:     Sufficient funds    Reasons to return to Middle East/not to overstay Sponsorship   My father has not been earning money since a year, however, given the economic conditions of the country we reside in. Further, he has transferred all of his money back to our home country, to invest in real estate. He currently does not have any money in his bank account.    My mother, on the other hand, earns money from teaching at a school. But as it happens in the Middle East, legally she is not on the school's sponsorship, and rather on my father's. I have a stable income, as my mother, and I am on my employer's sponsorship.    Having read other answers here, such as , it seems even if I or my brother sponsor our parents' travel, it seems my father would still need to show that he has enough money available at hand. And this money will need to be sufficient for my mother's expenses too, as legally she is under my father's sponsorship. In other words, the visit applications of my parents will probably be rejected.    Is there something we can do to prove to the UK visa officer(s) that we just intend to give our parents a tour of the UK, and that we will return to our country of residence?    Edit to add more info    Mother is under father's sponsorship Although my mother gets paid directly into her account by the school, not being under the school's sponsorship means she is legally still a housewife. The school will not offer an employment letter or salary slip to recognise my mother's employment.    Nationality We are Pakistanis, but have been living in Saudi Arabia for 27 years.    My travel history and visa I already hold a 5 year multiple visit visa for the UK, and I have been visiting every year since 2015.    Parent's travel history My mother has already travelled twice to the UK. Once when we were students, and another time in 2016 on a visit visa  (when my father had funds in his account). My mother submitted her and my father's bank statement, and salary slips she was fortunately able to acquire for once. She also travels regularly to Pakistan (at least once a year). My father recently travelled to Pakistan with the entire family but has never been to the UK.    Visit duration I plan to spend no more than 3 weeks, and my parents about a month.