How can I add new line/linebreak character in title attribute in HTML

I am using this  <a href="#" title="select from 1: this 2: that" > Click here </a>  When someone hover over it I see all the text in one line.  Is there any way to show it on new line?


Publication Lazarus project in Ubuntu Software Center

Can I publish desktop application has developed in Lazarus IDE in Ubuntu Software Center?


Reference for very basic books in Number theory

I'm confused about which books I have to read for Elementary number theory for the beginner level. I need references for  very basic books  in Elementary number theory  and that book  must contain given Topics below $ 1.$Divisibility $2.$ congruences $ 3$ .standard arithmetic functions $4.$ Combinatorics permutations and combinations.


Make a Trello card disappear until its due date

I'm using Trello as a GTD (getting things done) system and made a dashboard containing few list : Today, Next actions, Later ...  I'm used to tracks, a gtd web application which allowed me to make a card disappear until its due date. So when the due date comes, the card re-pop on my dashboard. I was using this a lot for reminders for project review, or check for people replies.  I can't find this option in Trello so I have a lot of cards in my later list and it is difficult to prioritize them. I saw the function allowing me to filter on due date but yet, this is not so handy.  Do you know if this feature is available or if is there a way to answer this need?


Have problem similar to this but that workaround does not work for me.   I need to access mapping node with Python so I can change values. This code worked for several times I used script but suddenly it does not work anymore.  bpy.data.node_groups["NodeGroup"].nodes["Mapping"].rotation[2] = math.radians(180)   Also looking at python output when changing values manually and looking at tooltip path output I should use something like this.   bpy.data.node_groups["Shader NodeTree"].nodes["Mapping"].rotation[2] = math.radians(180)   But I get error that Shader Nodetree does not exist.  Can anyone explain what is going on here, am I missing something here?


How to create individual chapter PDFs from included TeXs?

My document structure has   one file with preamble (i.e. MainTex) and around 75 individual .tex files (i.e. Chapter_01, Chapter_02, ..., Chapter_75) representing each chapter.   I am using \include command to create a one big PDF file, the output is MainTex.pdf. Life is all good up to this point.   If I have to create individual PDF for each chapter then do I need to run 75 times with each chapter name and rename the PDF manually to match to chapter name. Because if I include only Chapter_01 and run it creates PDF named as MainTex.pdf.  Is there a way I can automate this workflow?


HP Laserjet 1020 does not work, hp-setup fails to install plugin

I have a not-so-new HP LaserJet 1020 that works fine. Ubuntu recognized it, but on printing it did not do anything, except the document disappeared from the queue as if it had been printed. I looked up this problem and I installed hplip and entered this command to the terminal window:   sudo hp-setup -i   Than all looked fine, but in the end, when trying to download the plugin it displayed a red error message saying:  error: plugin download failed error code = 4 error:  file does not match its checksum. File may have been corrupted or altered error: Failed to install Plugin. error: The device you are trying to setup requires a binary plug-in. Some functionalities may not work as expected without plug-ins.  Please run 'hp-plugin' as normal user to install plug-ins. Visit http://hplipopensource.com for more infomation.   EDIT: my problem has been finally solved, and hplip was not needed. I had to install foo2zjs, an open source driver, that (I believe) was created for this issue. If you have the same problem, install foo2zjs according to the instructions on  . After installation run hp-setup again. That worked for me.


Methods to achieve a similar light grain texture?

I was looking at these beautiful artworks by Karolis Strauniekas and I'm wondering how he creates the textures on the images.      It looks like a mixed combination between a "noise" effect with a "grain" something and a "je ne sais quoi" of multiple textures. I currently working in Photoshop and I'm curious to know how he goes about achieving this look.  I'm not looking to steal his "look" but I find this style very inspirational regarding the texture.   His website:


How to create a newcommand for fontsize?

I am trying to create a command to modify fontsize with one parameter, it seems that the paramater is not expanding properly:  \newcommand{\mycfs}[1]{\fontsize{#1pt}{1.2*#1pt}}


i recently got a new computer asus n552vx, i installed ubuntu 18.04 via a usb drive (flashed with rufus in firt attempt and etcher in the second). after i installation is completed, i reboot the system and boot ubuntu through grub but it goes to a black screen then it loads   after some digging i tried      sudo apt install intel-microcode    then i updated my bios to the latest version asus bios Version 300 for asus n552vx. but the problem isn't solved. i installed ubuntu 16.04 and i had the same error. so i tried installing ubuntu 18.04 on my brother's laptop and it worked fine ..  Any help please ?


"Page Not Found" when trying to add a login on per-site Metas

I experienced a bug in "meta.stackoverflow.com" site.  Steps to reproduce:   Visit "MyLogins", for me, it is:  Click "add more logins…", then it redirects to:  Try to use any login method on that page, and get redirected to:    It says "Page Not Found".


How did Percy Weasley know who Professor Quirrell was if no Defense Against the Dark Arts teacher has lasted for more than a year?

Is it possible for Quirrell to have been in the DADA teacher for more a year? Could this be because he had Voldemort sticking out the back of his head?


Proving $\sum_{k=1}^{n} k \binom{n}{k} = n \cdot 2^{n-1}$ by double counting

I was given this formular, and am now tasked to use double counting to prove it:  $\sum_{k=1}^{n} k \binom{n}{k} = n \cdot 2^{n-1}$  Quite frankly, I have no clue on how to work this out. Of course, you could start out by looking at the numbers this produces:  n     result 1     1 2     4 3     12 4     32 5     80 6     192 7     448 8     1024 9     2304 10    5120   As far as I've understood double counting, there's two ways you can use it.   The first way is to imagine a matrix where you either put a tick into a field, or you leave it empty. Then counting the ticks in the rows and the columns individually must lead to the same result. Unfortunately, I see no way to apply this concept to this particular task.  The second way is to look for an intuitional problem that can be solved by either of the two ways shown in the equation. Again, I fail to come up with anything that makes sense; especially with the fact, that the sum in the left term makes everything even more complicated.  Do you have any ideas on how to solve this problem?


Floats - how to restrict floating to subsection only in one section of the document?

I have concluded that the package float allows figures to float within the section they belong to. However for one particular section I need to restrict the floating to the subsection (without forcing the exact location).   I think this is the description of what I need, but I can't work further with it.     outer counter - the presence of this parameter indicates that the counter associated with this new float should depend on outer counter, for example 'chapter'.   I need to set that outer counter to be subsection rather than section which is the default. however I only need that for one specific section. Everywhere else floats can float...  Seeing this:  \newfloat{type}{placement}{ext}[outer counter]   I have tried and replaced figure for figuresubsec on the cases I needed  and used this:  \newfloat{figuresubsec}{htbp}{floats-ext}[subsection]   however the pictures do appear but don't move to their subsection and they don't appear in the list of figures.


Collapsible fieldsets error for previous dates

The best way to determine the error is to try it yourself. In the reputation page I clicked(try to expand) the arrow (collapsible fieldset) in a certain day and pawn an error like this:    Error occurred when loading post body.   I tested it on Chrome and Firefox.  Update:  I also tested it on the following sites:   Anime & Manga Stackoverflow Meta Stackoverflow Arqade Photography Superuser DBA Server Fault   Now, I assume that this happens to all stack network to all browsers though I haven't tested on mobile/tablet device yet.


Is there a Truffle glitch where you can't get them when after you beat Plantera? I got him in my old world, and can't get him in my new world. In which I beat Plantera, I even saw someone say you can't get him after defeating Plantera.


Identification of a mysterious lifeform, what is this?

For the third time in a row, I found a mysterious life-form inside my house. I live in the Netherlands in the Eindhoven region, in a city called . Before I set it free outside, I put it in a jar to make a few pictures for identification purposes. What is this creature?


Mirroring the C: drive to a spare drive to protect against disk failure

Following on from this question: , I have a 237GB SSD C: drive (almost full, nearly 4 years old) with Windows 10. I have a 1.8TB magnetic drive (D:), currently unused and empty. I want to mirror the C: drive to the D: drive, so if the C: drive blows up, I don't have downtime as I go through a restore process. How do I do this (using Windows 10 or otherwise)? Can I do it by creating a partition on the 1.8TB D: drive so I 'm not wasting all that space? (C: drive is only 237GB.)  Obviously backups are already in place.  Edit: This is not a duplicate of my linked question. They are about completely different things. That question was about installing, not mirroring, Windows 10 on another drive on the same machine using the same product key, which is what I prefer to do. Still waiting for an answer there, please have a crack, I'd really like to know how to do it, and have a bunch of related questions about it. This question is about mirroring an existing C: drive to a second drive (using Windows 10 tools or otherwise), because that was suggested in an answer to the first question, although it didn't actually answer the question.


Transit Visa Requirement for Indian at Bangkok DMK

I'm from Mumbai, India and will be visiting Vietnam later this year with my wife.  For the return flight, we are planning to book the flight via DMK.  Below is my flight plan.  Thai AirAsia Flight   Ho Chi Minh 21.35pm - Don Mueang 23.05pm  Transit Time at DMK - 3h 20min  Thai Lion Air   Don Mueang 02.25am - Mumbai 05.40am  I had couple of queries:  a. Do we need a transit visa at DMK ? Will onward ticket to Mumbai, although with a different connecting airline suffice ?  b. Is 3 Hours enough time to collect baggage and check-in for the Lion Air Flight? I'll probably be arriving and departing from Terminal 1.   Would really appreciate some help on this.  Thanks.


Does entire and v>0 implies f is constant?

Let $f$ : $C$ to $C$ be a function. Assume that $f$ is entire and Im(f(z)) > 0 for all $z$ belongs to $C$. Does that imply $f$ is constant?  I think f will be constant,but can't deduce it  Its easy when the imaginary part(v) is constant but does v>0 also implies that f is constant?  what if v is non-negative that is it can attain $0$ also, will the result remain same?


What happens if a target becomes ineligible after a card has been cast?

Let's say I cast  on .   Before this resolves, my opponent casts  on the Llanowar Elves.  Giant Growth resolves, making the Llanowar Elves a 4/4. When the Strangling Soot resolves, is it able to destroy the Llanowar elves, or does it do nothing because Llanowar elves no longer has a toughness of 3 or less?


Present perfect vs. Past perfect for finished actions

When is the perfect tense used? All examples illustrating perfect are always answer to the same question.  So there is no way when I can simply said:     I have written a note   or   I had written a note   Is that right? Instead I  need to say:     I wrote a note   But if someone asked me: Did you finish a note? then I need to use perfect:     Yes, I just have written a note    or   Yes, I had written a note yesterday      Am I right?


I am really getting frustrated with this. In my theme I have a script file that is working. I am adding a new function to deal with some div but nothing happen. Cleared the cache...tried different things...nothing is working.  The following code is working perfectly fine when tested in jsfiddle, but in my site...nothing at all.  html code output:
   title

title

      logo

dsfdsfsdfsdfsdfsdfsdfdfs

     in my js script:  $(document).ready(function () {  $(".cal-full").mouseover(function() {          $(this).siblings('.cal-events-tooltip').addClass('cal-events-tooltip_show');     $(this).siblings('.cal-events-tooltip').removeClass('cal-events-tooltip_hide');      });  $(".cal-full").mouseout(function() {          $(this).siblings('.cal-events-tooltip').removeClass('cal-events-tooltip_show');     $(this).siblings('.cal-events-tooltip').addClass('cal-events-tooltip_hide');      });   });  Any help will be appreciated. Thanks!


I'm trying to create my first 3d model with material . so i pick up my radio to be my guide . There is a problem that i cant solve . i tried to create a grid in front of the radio but when i render it for testing i cant see that grid    and im not sure i did the right way to create this grid . I just use plane and then subdivide it 10 time twice ! and then use wireframe modifier to create tiny hold in the grid  AM i doing it right ? Plz give me some advice Thx you :)


I was wondering if there's any sort of package or something I could install in Ubuntu 13.10 to allow a graphical screensaver. I really do not like the blank black screen when the display turns off. I prefer abstract/colorful/exciting things over complete blackness. It reminds me of night which I think is bleak and boring. So any advice would be nice. Thanks


How To Give A Random File Name To File , Which i am Uploading?

I am uploading a file to a folder , i had given the file name as "1.jpg" , so when i am uploading a new file it will overwrite the existing one, So How i can give a random file name to the file which i am uploading  MY UPLOAD CODE IS HERE  @RequestMapping(value = "/event/uploadFile",headers=("content-type=multipart/*"), method = RequestMethod.POST,consumes ={"application/x-www-form-urlencoded"})     //String quote_upload=C:\fakepath\images.jpg     public @ResponseBody     String uploadFileHandler(              @RequestParam MultipartFile file) {         System.out.println("Creating the directory to store file");          if (!file.isEmpty()) {             try {                 byte[] bytes = file.getBytes();                   // Creating the directory to store file                 String rootPath = System.getProperty("catalina.home");                 File dir = new File(rootPath + File.separator + "tmpFiles");                 if (!dir.exists())                     dir.mkdirs();                  // Create the file on server                 File serverFile = new File(dir.getAbsolutePath()                         + File.separator+"1.jpg");                 BufferedOutputStream stream = new BufferedOutputStream(                         new FileOutputStream(serverFile));                 stream.write(bytes);                 stream.close();                  System.out.println("************Server File Location="                         + serverFile.getAbsolutePath());                  //return "You successfully uploaded file=" + name;             } catch (Exception e) {                 System.out.println("************failes"+ e.getMessage());                 //return "You failed to upload " + name + " => " + e.getMessage();             }             //return "You failed to upload " + name                     //+ " because the file was empty.";         }         System.out.println("hello");         return "hello";     }


How does peer review detect cheating when replicating a study isn't an option?

Disclaimer: This is the   of my question because the previous two have met with silence. Adapted to this site: For a scientific study to be accepted as "truth" the standard process is peer review. When the subject is something like math where you can follow through all the steps and recreate the logic in your head, that works great. But what about cases when that's not an option - for example, research into the efficiency of a vaccine or a new drug? After Phase 3 trials the pharmaceuticals company releases the data which is then scrutinized by (I'd expect) both peer researchers from rival companies and government agencies. But how can they detect that it's not all or in part a lie? There is after all a huge financial motivation for the company to do it. Even when the reviewers are highly motivated to find any traces of fraud, what is the actual process by which they do it, if they can't replicate the study itself and compare the results?


I'm experiencing issues with the server and noticed that i'm under some sort of a DDOS attack, i have blocked the IP's in the Firewall, yet the IP's show up in netstat.  Is this normal?  tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:39159               FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:40090          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:40219          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:42108          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:43430          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:44562          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:46282          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:46642          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:49739          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:50050          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:50644          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:51843          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:52098          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:53080          FIN_WAIT1    tcp        0      1 10.1.1.59:80                DDOS.IP.HERE:54026          FIN_WAIT1


In OpenLayers 5, if loading of some tiles has failed (because of temporary network issue, for example), those tile are never attempted to load again.  Is it possible to force OL to retry loading of those tiles?  Workflow:   disable network zoom in (to zoomlevel 2), all tiles fail zoom in again enable network zoom out, you are back in zoomlevel 2 now. No tiles are displayed <- OL should reload those errorneous tiles   Goal is not to reload whole layer - OpenLayers should attempt to reload only failed tiles every time, when those are displayed on map.


I have a TreeMap with the key being a string and the value a pair, type (Integer, String) and I need my treeMap to be ordered by the key of the Pair. I haven't worked with Pairs much and am curious the best way to do this.   I am having a hard time creating a TreeMap comparator for the pair. I am currently adding the pair to the Map upon my add function. Do I need to create a subclass for the Pair itself and use a comparator within the subclass or can I just access the Pair within a treeMap class via comparator. This is what I am trying to add a comparator to.  private final TreeMap<String, Pair<Integer, String>> cacheFiles; public Cache(int size) {     this.cacheFiles = new TreeMap<String, Pair<Integer, String>>();     this.size = size;     this.currSize =0; } public void add(String fname, int cost, String contents) {     if (!cacheFiles.containsKey(fname)) {         updateSize(cost);         cacheFiles.put(fname, new Pair<Integer, String>(cost, contents));     }   I need my TreeMap ordered by "cost" so that when I remove the firstEntry or lastEntry it is removing the largest cost or the smallest as I cannot keep track of a key for every Map entry that may have to be removed at a given point.   This is sorta what I've been trying...Yet the editor does not like it whenever I try to use comparator of Pair.   Thanks for any help!      public Cache(int size) {     this.cacheFiles = new TreeMap<String, Pair<Integer, String>>(new Comparator<Pair>() {         public int compare(Pair<Integer, String> p1, Pair<Integer, String> p2) {             return o1.getKey().compareTo(o2.getKey());         }         });     this.size = size;     this.currSize =0; }


What is the difference between a class and a set?

I know what a set is. I have no idea what a class is.   As best as I can make out, every set is also a class, but a class can be "larger" than any set (a so-called "proper class").  This obviously makes no sense whatsoever, since sets are of unlimited size. It's not like you get up to 25 elements and go "oh, hey, sets are limited to a maximum of 20 elements, so we'll have to call this 25-element thing something else".  Does anybody know what the actual difference between a set and a class is?  Several people have pointed out that you can write paradoxes which involve sets. I get that. But where do classes come into the picture?


How to determine the real visibility of an element?

How to use JS to determine the real visibility of an element? For example, there is the following demo   .red{   width: 100px;   height: 100px;   left: 20px;   top: 20px;   background: red;   position: absolute; } .blue{   width: 50px;   height: 50px;   left: 60px;   top: 60px;   background: blue;   position: absolute; } .green{   width: 100px;   height: 100px;   left: 50px;   top: 50px;   background: green;   position: absolute; }

    How can I check that the "blue" element is not visible on the screen? Is there a way to determine the real visibility of an element at a given time to the human eye? Same question with z-index. checking all elements and comparing which z-index is not an option, of course, and the elements can be in different positions.


How to determine if I should use "St." or "Saint"?

I'm referring specifically to city names, though I suppose this applies to other things named after saints.  I'm looking at the Wikipedia pages for my "sources of truth".  is fairly split, with 170 instances of "Saint Paul" and 40 instances of "St. Paul".  , however, is almost always St. Louis, with only 5 instances of "Saint Louis" and 460 instances of "St. Louis".  I'm looking for any semblance of rhyme or reason here, but I can't seem to find any documentation on this.  I thought it might be official names, but it appears  is officially "City of Saint Augustine", but the text for the page only includes that 4 times (compared to 139), and none of those are in the actual text.


Is there a pythonic way to check if a prompt or input statement is a float?

Hi I think I see a lot of people having knowledge in depth in field of computer science.  My question is in python3, is there a way to check if an input statement or a string value is a float?  I am expecting something like   str.isfloat()   Thank you for taking a look for this poor student :)


Low Quality review queue erroneously showing "Close" instead of "Recommended Close"?

I was in the Low Quality Review queue, and the following review confused me:    It's showing eight "Close votes", which should be more than enough to close a question.  I checked the question's , and it wasn't somehow closed, then re-opened in the middle of the review.  So I then checked on each of the users, and noticed that the majority of them are under 3000 reputation, meaning they can only "Recommend Close".    However, all reviews are simply showing as "Close", which is extremely confusing.  Is this a bug, or possibly an undocumented change related to ?    Another recent example:


Distance between points along polyline ArcGIS for Desktop?

I'm using ArcGIS 10.3 (Desktop), and I'm trying to measure the distance between points following a path determined by a set of polylines.  Hand measurement is not a viable option-- there are ~7500 points, and my polyline set is the global coastline.  The ultimate goal is to get the spacing of these points along the polylines, so that I can analyze this with respect to a few other variables.   I can read python-- with a bit of effort-- but not write or edit it, so code-based solutions will not be particularly useful to me.  I have tried using the linear referencing tools-- I snapped the points to the lines, then transformed the polylines to routes and used 'locate features'-- but because my points are not (entirely) ordered along the path, using the difference between  linear reference locations of subsequent points yields some fairly unlikely answers.  In addition, spot checks of (hand-measured, using the built-in path length measuring tool) point-to-point along-polyline distance yield different answers than given by the corresponding linear references for the point pair. (Some of the answers were close enough that they could very well be measurement error on my part, but others were nearly 20%, despite my having zoomed in and snapped the measurement cursor to the polyline, proceeding vertex-to-vertex.)  Sorting first by linear distance seems to fix the first problem, but in light of the second one, I remain skeptical of this process.   I then tried simply splitting the polylines into segments ('split line at point') using the (snapped) points as the dividers, with the eventual goal of finding the segment length with the calculate geometry feature.  This produced gibberish. I'm not sure what criteria ArcGIS used to split the lines, but it wasn't the point set I provided.  Segments in the resulting shapefile ran right through tens of points, only to terminate at a place with no point. (Also, there were segments utterly empty of points...you get the gist.) I reiterate that the pointset was specifically snapped to the polylines, so this problem shouldn't be caused by excessive distance between the point and the polyline.  I'm at a bit of a loss, here: could someone point out where I might have gone astray and/or suggest a solution?  Or, failing that, a new method that I could try?  It seems like a fairly basic (not necessarily simple, but fundamental) analysis to do with geographic data, and I don't understand why it has presented so many difficulties.


How to add GFCI to a box with one outlet controlled by a switch?

I'm pretty inexperienced when it comes to electrical work, though I do know my way around a circuit diagram, thanks to some EE courses in college.  I think this is one I can do myself, I just would like some validation that I understand the wiring correctly and that my plan is acceptable.    Current Configuration  I have an outlet and single pole switch in one box next to the sink in my kitchen.  The switch controls the top outlet, and has plugged into it a fluorescent light that is mounted above the sink.  The bottom outlet is always hot, and I currently have my microwave plugged into it.  I opened up the box to look at the wiring (with the breaker off, of course), here's a sketch of what it currently looks like inside:    One additional note on the setup - my fridge is connected to the same breaker as this outlet, and I'm 90% sure it's further down the line.  I'd rather not put the fridge on the GFCI load, as I don't want my food to rot if it randomly trips while I'm out.    Questions  I want to protect the outlets next to the sink with GFCI, but I want to keep one of the sockets controlled by a switch, and I don't think I want to put the rest of the circuit on the GFCI load, because I don't want the fridge on GFCI.   What's the simplest and/or best way to rewire to achieve this? I'm not sure which of the lines leading into the box comes from the breaker box - is there an easy way to test this? Is there an easy way to test for sure whether or not the fridge outlet is before or after the sink outlet?     Tentative plan  I know I can get a GFCI/switch combo unit at Lowe's for ~$30.  I'm thinking I could replace the switch with that, and wire the existing regular outlet to the load end of the GFCI (with the top outlet wired through the switch), but have the rest of the circuit wired to the line (i.e. not on the GFCI load).  I think this does what I want, plus gives me a bonus GFCI-protected outlet by the sink.  Something like the first diagram in the answer to , actually, except with the top outlet connected in place of the garbage disposal, and the bottom outlet also connected to the load.  Does this sound reasonable?


What are those "._" files show in tar verbose output, but are not in the untarred directory?

Some hidden files appear in the verbose output of tar, but then do not exist in the directory where the tar output is deposited. I am surprised by this because I thought working in Terminal command line was pretty brass tacks. What you see is always what you get?    /tmp$ tar xfv drills_grp01.tar x Drills_grp01/ x Drills_grp01/._.DS_Store  // <-- what? x Drills_grp01/.DS_Store x Drills_grp01/._symm_hrz.txt  // <-- what? x Drills_grp01/symm_hrz.txt x Drills_grp01/._symm_vrt.txt  // <-- what? x Drills_grp01/symm_vrt.txt x Drills_grp01/._table_similarKj.txt  // <-- what is this? x Drills_grp01/table_similarKj.txt     /tmp$ cd Drills_grp01 /tmp/Drills_grp01$ ls -a .DS_Store     symm_hrz.txt     symm_vrt.txt     table_similarKj.txt   In the ls -a output, where are all those ._* files I saw in the verbose output?  The life cycle of this tar file is:   files created in Windows XP, using TextEdit, saved to FAT32 file system.   compressed using the "ZIP" file format.   copied to MacOS (Extended / Jounaled).   decompressed using unzip   tar cfv stuff.tar Stuff   bzip2 stuff.tar   I'm curious. Why does the verbose output of tar xfv stuff.tar not match the actual output? Also, this means that the verbose output of any command in Terminal might not match the actual output? Trivial yes, but just something to be aware of.


How can I figure out how a search engine is finding hidden pages?

We have a system hosting many websites for our customers, and inside that system there is a method that non-live customers can view their sites before we turn them on.  Say the link is something like this: ourbigcompany.com/customer/domain=thisisanewsiteurl  Those links are not linked to anywhere outside a secure login - they are only sent to the customer via email. They are publicly viewable, as they have to be, but that's not the real problem.  The real problem is that somehow Bing is getting hold of them and trying to crawl the sites.   I know how to stop the crawling, but that would be like treating the symptoms without fixing the problem.  We log the traffic and there is no referrer - so that is not helpful.  If I change the querystring value for a site, Bing has it within hours. I need to figure out where Bing is getting the links from so that I can close what is obviously a security hole, but I am not sure how.   Any ideas on how to figure that out?


I have python 3.6.7 installed on Ubuntu Server. When I install pip with   apt install python3-pip   I get an SSL error. How can I install pip 1.2.1 avoiding such errors?  This what happens when I try to install anything with pip3:     Retrying (Retry(total=3, connect=None, read=None, redirect=None,   status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL:   CERTIFICATE_VERIFY_FAILED] certificate verify failed   (_ssl.c:847)'),)': /simple/opencv-contrib-python/


Was it intentional that Luke and Darth Vader did not meet during A New Hope?

Having watched A New Hope again, I have just realised that the only people to meet Vader in person out of the main good characters are Leia and Obi-Wan. It's understandable why Han didn't interact with Vader but why doesn't our main hero do so like in all other movies?  Not a dupe of . I don't believe the answers in there actually answer my question.  I know there were plans for Luke to be told that Vader was his father but I find it odd that there was no pre-reveal meeting between the two of them such that both of them would have an initial impression as to who they were dealing with (that IMO would have made the reveal even deeper to Luke than what is actually portrayed). After all, Luke was told about Vader's reputation by Obi-Wan and Vader had sensed that Luke was somehow connected to the force.


Here's my problem: over the past couple days I did a really good clean out of my computer and managed to free up several gigabytes of data and was hovering around 233+ gb of free space.   Then in the last couple of days I noticed my trash file was taking a really long time to empty (I don't know if this is part of the problem but wanted to mention it just in case).  Last night I noticed I was missing quite a lot of space on my drive, it was around 205 gigs now. I discovered I had accidentally set some large torrent files to be on my main drive instead of an external. No matter, I figured! I would just delete them and start them over on the external. But my disk space didn't seem to change. So I rebooted - after all I had recently used Photoshop and that tends to hog a bunch of space and I don't get it back until I reboot.  I rebooted and there was still the same ~205 gb of free space. I was very confused. I was even more confused when I checked "About My Mac" and saw that it was telling me that in actual fact I only had around 90gbs of free space. THE HECK!?  I did notice that my "backups" were surprisingly high - 119gb in fact. This was especially curious since I have a time machine drive (time capsule) thats supposed to be backing up hourly. I did get a message this morning telling me it was full, but isn't it supposed to clear itself out?  Running WhatSize (it's still running by the way) I see that my .MobileBackups folder is a gargantuan 134gb! I thought these were temporary! For when I'm not connected to Time Machine (WHICH I AM!)  What in the hell is going on? How did I magically lose close to 25 gigs? And how the hell do I get it back?


Can I set a CNAME to point to the CNAME of a separate domain

I want to insulate myself from changes to the domain of the server we're using.  For example, right now we need to point to:  www.oursite.com.    IN  CNAME   www.myserver.com.   But the service we're using to host the site is changing it so we have to change the CNAME of every domain we have pointed to their new domain:  www.oursite.com.    IN  CNAME   www.myserver-two.com.   Since we have over a hundred domains that we must make this change to, we want to insulate ourselves in case this happens again in the future.  Is it valid to setup a single domain ourselves:  www.corpsite.com.  IN CNAME  www.myserver-two.com.   And then point all of our other domains to that one:  www.oursite.com.   IN CNAME  www.corpsite.com.   Such that www.oursite.com will route through www.corpsite.com and end up hitting the correct server at www.myserver-two.com?  EDIT:  We have attempted this on one of the domains and it... appears to be working, but we cannot ping it (pings timeout).  So we're not sure if it's just "accidentally" working, and what other issues there might be to doing things this way.  And this is what happens when I ping it:  $ ping www.oursite.com PING us-east-1-a.route.myserver-two.com (scrubbed): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 Request timeout for icmp_seq 3   I think this is unrelated - I believe the server we're using is dropping ICMP packets.


If there is a quote at the end of a sentence, does the period of the quote go before or after the end quotation mark? And if the quote is ended by a question mark does it replace the period that would be at the end of the main sentence?


Windows 7 Automatic Log-on with a Default User Account?

I have two User Accounts for my Windows 7 with no password requirement. I frequently use one of those accounts; so I would like Windows to log-on automatically with that account without the need for user input.  P.S. I don't prefer installing/using a third-party software for that purpose; especially those that place at low levels before Windows log-on.


The title says it all really... This is one of those value statement things. 'Show we care' is the proposal. It just sounds like lazy English to my ear, I want to say 'Show that we care'  Ignoring the trite nature of the statement, should I care?


How to load a .osm file as a basemap tiles in openlayers 3?

I am working on an app that needs to be used offline so I have downloaded a map in an .osm file, I need to load it as a basemap. I did some research and found this code I used but it shows the map as a vector layer:  new ol.layer.Vector({             source: new ol.source.Vector({                 format: new ol.format.OSMXML(),                 url: 'Maps/Tangier_Medina.osm',                 projection: 'EPSG:4326'             }) })   I thought at first that specifying the format  ol.format.OSMXML()   will be enough but I need it to be a basemap with tiles.  Anyone knows how please ?


Consequences of not showing up for one leg of journey

Recently I booked a flight using my points. I am  planning to fly to Seattle WA from Indianapolis Indiana.  Stop over is Chicago.  On the day of my flight I am supposed to be in Chicago.   So I was wondering if I can directly board my Seattle flight from Chicago thereby not showing up in Indianapolis.  Is this okay?  Will United airlines cancel my entire journey if I do not show up in Indianapolis?


Group action with a single orbit has a $g \in G$ with no fixed points

Let $G$ be a group acting on a set $S$ where $|S| \geq 2$.  If this action has one orbit, show that there exists a $g \in G$ which has no fixed points.  I feel I am having trouble proving this because I am not sure exactly what it means to have one orbit.   I am taking the set $Gs = \{g\cdot s : g \in G\}$ to be the orbit of $s \in S$.  For every $s \in S$, we have $e \cdot s = s$.  In this case doesn't 'one orbit' mean that the orbit would be all of $S$?  Any help is appreciated.


What are the alternatives to Socket Programming?

I was browsing around for programming troubleshooters, and I was wondering what the alternate would be for Socket Programming; if there is one.


Switched from cycles to blender, made render turn black and white

Hi so I was creating something in cycles and then I realized that I needed to use the halo material for an effect and so switched back to blender render but now when I try to render the picture it comes out as black and white (it came out in color in cycles) I have the render settings set to RGBA but it doesn't work in RGB either.   Please help Cheers  Also a side question, although cycles is better than blender from what ive read they both have different unique features so which is better for what?


ilist vs list.why and when we use from both.give me practical scenario

I know that IList is the interface and List is the concrete type but I still don't know when to use each one. Is there a better way to decide when to use the interface or the concrete type with some practical scenario.  I want to know why I use IList and why I use List in our project.


Variable scope - database.query() has access to variables not in scope

I was answering a question and this little inconsistency popped up.  Just wondering if anyone has come across it before, or if anyone knows why this happens.  A variable that is declared within some form of scoped element (if, for loop, etc.) shouldn't be available outside that scope.  i.e.  {     // accountNames variable is not available outside this scope     Set<String> accountNames = new Set<String> {'Test Account'}; }  system.debug(accountNames);   This debug statement fails with the message:      Variable does not exist: accountNames   However, if this is part of a query string being generated, the Database.query() call somehow has access to it.  String queryString = 'SELECT Id, Name FROM Account';  if(true) {     // accountNames variable is not available outside the `if` statement     Set<String> accountNames = new Set<String> {'Test Account'};     queryString += ' WHERE Name IN :accountNames'; }  // this debug will fail if you uncomment it // system.debug(accountNames);  // however the query somehow has access to it. // create an account called Test Account to prove it.  system.debug('queryString: ' + queryString); system.debug('queryString result: ' + database.query(queryString));   But, Salesforce is smart enough to know that it's not just some random string, so the following will fail:  // Alternatively, use a random string as the variable name, and salesforce  // is smart enough to know it's gibberish String queryString2 = 'SELECT Id, Name FROM Account';  if(true) {     queryString2 += ' WHERE Name IN :randomString'; }  try {     system.debug('queryString2 result: ' + database.query(queryString2));     system.assert(false); } catch (QueryException qe)  {     system.debug(':randomString is gibberish: ' + qe.getMessage()); }     Edit:  Interestingly, the :randomString is definitely calculated only when the query is executed.  String queryString3 = 'SELECT Id, Name FROM Account'; String queryString4 = 'SELECT Id, Name FROM Account';  if(true) {     // assign to query 3 before it has a value     queryString3 += ' WHERE Name IN :randomString';      // assign to query 4 after it has been declared     Set<String> randomString = new Set<String>{'Test Account'};     queryString4 += ' WHERE Name IN :randomString'; }  // both queries return correct results, regardless of when the variable was declared system.debug('queryString3 result: ' + database.query(queryString3)); system.debug('queryString4 result: ' + database.query(queryString4));   But it's not an open slather.  The following throws an error:  String queryString = 'SELECT Id, Name FROM Account WHERE Name = :someField'; someMethod(); system.debug('queryString result: ' + database.query(queryString));  void someMethod() {     String someField = 'Test Account';     system.debug('someField: ' + someField); }     Does anyone know why this is the case, or have an explanation why this would work?  As far as I can tell, at the time that the accountNames variable is in scope, no part of the code knows that it's anything other than a string.


Generics restricted to specific value types

I'm currently trying to write an extension method to work out the allowed variance for a decimal. While I was writing it I thought I'd extend it to a generic extension, with restrictions to decimal, float, double.  Currently I'm not aware of how (or if it's possible) to restrict a generic to value types.  public static bool WithinVariance(this decimal source, decimal allowedVariance, decimal comparisonValue)         => WithinVariance<decimal>(source, allowedVariance, comparisonValue);  public static bool WithinVariance<T>(T source, T allowedVariance, T comparisonValue)     // where T : decimal     // where T : double     // where T : float  {     var allowedDifference = (source / 100) * allowedVariance;     var difference = source - comparisonValue;     return Math.Abs(difference) <= allowedDifference; }   The above code doesn't work, it's there purely to show the approach I'm taking. Originally I was just going to a single method, but I changed to the above to try to hack it into working. Also an attempt at restricting the extension methods without using a where t filter (see commented out lines)  Does anyone know if it's possible and if so how to do this?


How to force run antivirus at boot time if a persistent virus present?

i get a virus, undetectable with virus scanners in offline OS state. The virus doesn't let to run antiviruses, debuggers, cmd, msconfig. Unfortunately, by backup is broken.  My idea is to force run in contaminated OS (Windows 7 x64) an antivirus or rootkit remover at system start or even before OS start to run the OS like in emulator, but i'm noob in the technologies like these.   I think this could produce better results than  of off-lined or online OS using different tools, because of another level of control - it's dynamic control of code execution, similar to debugging.  How and which tools|antiviruses can be run at boot of infected OS?  I did try to run with no success   aswmbr.exe   Autoruns.zip avast_free_antivirus_setup_online.exe  avg_antivirus_free_setup.exe avira_en_fass0_1341776598-1558627902__ws.exe ComboFix.exe GMER.exe  mb3-setup-37469.37469-3.7.1.2839-1.0.586-1.0.10430.exe mtze6570.exe  radix_installer.zip SmartFix.exe tdsskiller.exe msconfig cmd as admin far as admin.   Autoruns managed to run, but nothing set as being run at system startup, as everything was let out earlier.  Please note, the question is about how to run antivirus or tool over contaminated OS without antivirus installed in it.  There are , related to scanning or defending with antiviruses, but don't see solutions for unsuccessful offline scan with virus actively preventing antivirus start.  If you consider the question is been answered, please provide your exact link to the answer with explanation.


The work done against gravity is $mgh$, well at least that's what my textbook says. I have a question: I can apply a force say 50N, so total work done = $mgh + mah$. Where $ma$ = Force. But the truth is irrespective of the force applied, the work done against gravity is always $mgh$. Why?  For example, when I move an object with a force, the work done is more, so work depends on the Force. But in case of gravity it always depends upon the weight


I have a Herschel suitcase and the reset button is pressed in and now stuck, which means any combination will unlock the suitcase. does anyone know how to fix this?


Why won't my nether portal bring me back where I left?

On our minecraft server, I've built a Nether portal in my basement. Which connected two-way (tested) to a location in the Nether.    This nether portal took me to an area in the nether which was a small cave. I dug upwards and surfaced close to a Nether Fortress. After clearing the fortress of Blaze spawners, I decided to 'move in'. So I went back to the portal, dismantled it, and reactivated in in a location in the Fortress.    The fortress would be within the same 128m radius I would assume as it's really close to the original place. Literally some steps to the surface, then a ladder up the nearest Nether Fortress bridge support.  Now, taking this portal back to my original doesn't work, I spawn deep underground in an Abandoned Mine Shaft.  I read somewhere that my Nether portal has found a 'better match' and this could be remedied by disabling the 'wrong' portal in the mine shaft.  However, upon multiple attempts, a new nether portal is dynamically created in the same area. See screenie for example. You'll see two 'stacked' portals on the left (from my different attempts at disabling) and then the current active one on the right.    My question is, how can I make sure these portals go to the correct place. Is it a matter of returning the portal to it's original location or am I stuck for returning to the basement?


Applying for tourist visa for US in country other than your own

Possible Duplicate:          Can British passport holders apply for a B2 USA visa from other countries, if they are living there? Or do they have to go back to Britain to apply for it?


Find the derivative of the function using the limit definition of derivative:

Find the derivative of the function using the limit definition of derivative to:  $f(x)=\sqrt x$


list= []  x = ['A', 'B', 'C', 'D', 'E', 'F', 'G']  for i in range(2):            list.append(x)  list[0][0]="x"  print list   And after printing I get this:  [['x', 'B', 'C', 'D', 'E', 'F', 'G'], ['x', 'B', 'C', 'D', 'E', 'F', 'G']]   The first item in every list was replaced by 'x' whereas I only wanted the first item in the first list to be replaced by 'x'(hence the line list[0][0]="x")


How can I lower the volume of my USB headphones?

Yes, I really am asking how to turn down the volume. But first, some more detail:  My headphones are   They are really loud. I usually have to keep them on the lowest setting. If the source material is louder than average, I have to lower the output volume in the player software.   Is there a way to can adjust the Windows 7 volume settings so that my normal listening volume is around 50% instead?


Why is this quotient space not Hausdorff?

I am trying to show that the following space is not Hausdorff. Consider the topological space $S^1$, and let $r$ be an irrational number. Consider the action of $\mathbb{Z}$ on $S^1$ given by $$ S^1\times\mathbb{Z}\to S^1; (e^{ix}, n)\mapsto e^{i(x+2\pi n r)}. $$  Let $S^1/\mathbb{Z}$ denote the orbit space. I want to show that this space is not Hausdorff.   It was suggested to me that I try showing that any orbit under this action is dense in $S^1$, but I am getting stuck on proving that bit. But here is what I was thinking: we know that the topological group $\mathbb{R}/2\pi \mathbb{Z}$ is homeomorphic to $S^1$, as seen by the map $t\mapsto e^{it}$. Denote the following composition of maps $$ \mathbb{R}\to \mathbb{R}/2\pi \mathbb{Z}\simeq S^1\to S^1/\mathbb{Z} $$ by $\phi$. Then if $[e^{ix}]\in S^1/\mathbb{Z}$, it follows that  $$ \phi^{-1}([e^{ix}]) = \{x+2\pi(nr+m)\mid n, m\in\mathbb{Z}\}. $$ If I can show that this subset is dense in $\mathbb{R}$, then it follows that the set $[x]$ as a subset of $S^1$ is dense. This is where I am getting stuck, and it is not even clear to me that this is necessarily true.  Any hints or suggestions are appreciated. Thanks!


Can the words "is" and "that" be used back-to-back in the following sentence?  The reason I went to the store is that I ran out of milk.  Similarly, can "is" and "because" be used as such? For example:  The reason I went to the store is because I ran out of milk.


How to merge rows into single column using FOR XML PATH in sql?

I want to merge rows into single column using FOR XML PATH in SQL.  Here is my Query:  select d.Device from tbl_Sales_OrderItems tsoi left join tbl_devices d  on d.DeviceID=tsoi.DeviceID where salesorderid=102  and tsoi.Quantity>0 and tsoi.TypeID=1  union all  select d.Partnumber Device from tbl_Sales_OrderItems tsoi left join tbl_VendorParts d  on d.VendorPartID=tsoi.RefID where salesorderid=102  and tsoi.Quantity>0 and tsoi.TypeID=2   Here i am getting two rows i.e Two Device name in from tbl_Sales_Order.   Now these rows i want to get in single row using FOR XML PATH into a single column.   Further after applying FOR XML PATH i want to use it in select query i want to use the row value which would be as follows.  Select salesorderid,@resultinRow from tbl_Sales_Orders   Output Required:  SalesOrderID  Devices   102          Device1,Device2   103          Device3,Device2


Why add extra space between a word and punctuation (e.g. a period, question mark, etc.)?

I was just wondering this because of noticing a lot of people I've worked with typed this way.  Examples:  Okay, that's great .  Thanks, Stephanie .  Was there anything else ?  I was wondering if there is something that this could derive from.


How to import excel in SharePoint List programatically in SharePoint 2013. Excel having more than 40000 entry.


After making it through the major parts of an introductory Lisp book, I still couldn't understand what the special operator (quote) (or equivalent ') function does, yet this has been all over Lisp code that I've seen.    What does it do?


How to install the Class::Method::Modifiers module in Perl?

I'm trying to use the library MSGConvert to convert outlook emails to .eml emails, but I have had some dependency issues with perl (I think). The backtrace indicates that I may need to install a perl module. How can I do that? Thank you in advance.  Cant locate Class/Method/Modifiers.pm in @INC (you may need to install the Class::Method::Modifiers module) (@INC contains: /etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /usr/local/lib/site_perl .) at /usr/local/share/perl/5.18.2/Moo/_Utils.pm line 43. Compilation failed in require at /usr/local/share/perl/5.18.2/Module/Runtime.pm line 317. Compilation failed in require at /usr/local/share/perl/5.18.2/Module/Runtime.pm line 317. Compilation failed in require at /usr/local/share/perl/5.18.2/Email/Sender/Role/CommonSending.pm line 9. BEGIN failed--compilation aborted at /usr/local/share/perl/5.18.2/Email/Sender/Role/CommonSending.pm line 9. Compilation failed in require at /usr/local/share/perl/5.18.2/Module/Runtime.pm line 317. Compilation failed in require at /usr/local/share/perl/5.18.2/Module/Runtime.pm line 317. Compilation failed in require at /usr/local/bin/msgconvert line 9. BEGIN failed--compilation aborted at /usr/local/bin/msgconvert line 9. Unexpected Error!


Is $H_2O$ the only compound which has a density anomaly?

My question is simple: are there any elements, compounds or materials other than water ($H_2O$) which have a density anomaly characterized by a turning point in the $T-\rho$ curve?


How to hide title bar in Firefox 57 Quantum?

I used to use an extension to hide/show the title bar in Firefox, but since Firefox 57 was released most of the extensions were disabled.  In Chrome I just uncheck the option "Use system title bar and borders" and it's done.  Are there any ways to do that?


How to compute the series: $\sum_{n=0}^{\infty} (-1)^{n-1}\binom{1/2}{n}$

I'm wondering about how to show compute this series: $$\sum_{n=0}^{\infty}(-1)^{n-1}\binom{1/2}{n}$$ My approach was to use the general formula of the binomial series, which is: $$(1+z)^r=\sum_{k=0}^{+\infty}z^{k}\binom{r}{k}$$ Yet this can't be used because in this case, we have $|z|=1$. Thus, is there any method that I can use for this?


Why have some of my Pokecoins disappeared?

I purchased 1200 Pokecoins which showed up in the game.  Later I discovered they were down to 880, without me ever authorizing any purchases.  What is going on?


In C#, if you want a method to have an indeterminate number of parameters, you can make the final parameter in the method signature a params so that the method parameter looks like an array but allows everyone using the method to pass as many parameters of that type as the caller wants.  I'm fairly sure Java supports similar behaviour, but I cant find out how to do it.


How do I spread taint to a certain area in Thaumcraft?

I'm trying to make taint spread to a certain area in my world, as in, to a small NPC structure. Is there any way I can do this? I even tried using MCEdit to set the biome, but there's no "enter biome ID" thing, and Tainted Land isn't listed.


shooting the projectile in the way it is facing

I got my projectile facing the right way thanks to @S. Tarık Çetin. But now I want it to move the direction it's facing. I think I need to use RayCastHit2D but I am not sure. If I need to use RayCastHit2D please tell me how.   I want to replace this part with RayCastHit2D or something else -:  MyRB.AddRelativeForce(new Vector2(1,1) * rocketSpeed, ForceMode2D.Impulse);   Another thing - my projectile requires gravity. I think if I use RayCastHit2D the projectile will go in a straight line and not fall down. So if that's the case please tell me a better alternative. (so it acts like a tank projectile)  here is my code -:  Aim class -          void Update(){         if (Input.GetKey(KeyCode.L))         transform.Rotate(0, 0, -3.0f);          if (Input.GetKey(KeyCode.J))             transform.Rotate(0, 0, 3f); }   ProjectileController class -        void Awake()     {         MyRB = GetComponent<Rigidbody2D>();         MyRB.AddRelativeForce(new Vector2(1,1) * rocketSpeed, ForceMode2D.Impulse); }   GunController class -:  void Update() {      //playershooting     if (Input.GetAxisRaw("Fire1") > 0)         fireRocket();  }  void fireRocket() {      if (Time.time > nextFire)     {          nextFire = Time.time + fireRate;          Instantiate(bullet, guntip.position, guntip.rotation);       }


Why do I get "Cannot redirect after HTTP headers have been sent" when I call Response.Redirect()?

When I call Response.Redirect(someUrl) I get the following HttpException:     Cannot redirect after HTTP headers have been sent.   Why do I get this? And how can I fix this issue?


Apt-mirror for amd64 did not include focal/main/dep11 and focal/main/cnf/Commands-amd64

I try to create a local version apt-mirror of ubuntu 20.04 repositories. But I do not succeed to upload   focal/main/dep11 and focal/main/cnf/Commands-amd64 and the command apt-get update ... E: Impossible de récupérer http://mirror/ubuntu/dist/focal/main/dep11/icons-48x48.tar 404 Not Found .. E: Impossible de récupérer http://mirror/ubuntu/dist/focal/main/cnf/Commands-amd64 404 Not Found ..  Thanks for your help


In windows, is there any way to get a list of all files in a folder, including all the files within all the subfolders?


Are $\mathbb{R}^1$ and $\mathbb{R}^2$ the same infinity?

I've seen a proof that shows that rational numbers are not the same infinity as real numbers.   I'm curious if there is a proof that shows $\mathbb{R}^1$ and $\mathbb{R}^2$ are the same infinity. If so, is there a way to map from one to the other for all points?


What are the assumptions of maximum likelihood estimation for a linear regression?

I'd like to know the necessary assumptions of maximum likelihood estimation for a linear regression. Hope to hear some explanations.


Similar matrices have the same eigenvalues with the same geometric multiplicity

Suppose $A$ and $B$ are similar matrices. Show that $A$ and $B$ have the same eigenvalues with the same geometric multiplicities.      Similar matrices: Suppose $A$ and $B$ are $n\times n$ matrices over $\mathbb R$ or $\mathbb C$. We say $A$ and $B$ are similar, or that $A$ is similar to $B$, if there exists a matrix $P$ such that $B = P^{-1}AP$.


Can the suggested edit page *not* show the edits you've already voted on?

Having the questions you've already voted on makes it more work to find things that still need attention.  Note, I am talking about when you refresh the page, not the JavaScript action that happens immediately after you action an item.


In Minecraft, I know you can breed animals. In fact, in recent updates it's required for the player who just can't start their mornings without bacon and eggs!  I've tried pulling two pigs together in a single pen, but all they do is snort at me. And the chickens? Well, there's plenty of eggs, but no hatching.  How do I get them to make more bacon and eggs?


When $\theta$ is very small why $\sin \theta$ is similar to $\theta$ and $\cos\theta$ similar to $1$? Is it related to limits or we can prove it simply by using diagrams?


Best practice on folder layout in revision control?

I'm just coming into a company on what is essentially my first gig as a team member rather than the sole Windows developer, and I'm not liking the current version control setup.  We're developing for Windows machines using VB.net at the moment, with live software dating back to VS2005, being updated to newer Visual Studio versions as and when major upgrades are made to the software. Most jobs are admittedly one-developer-at-a-time things, so there's possibly not as great a need for good version control as there is on larger, multi-developer projects, but what we've got now sucks pretty hard, so I'm trying to put together a proposal for something that sucks less.  First problem is that they're still using SourceSafe (Boo! Hiss!), but everyone seems pretty open to moving over to something else if I can come up with an alternative. SourceSafe isn't the reason for my question, though.  Basically, there's a single SourceSafe repository, and into this has been thrown every single project that's ever been worked on in the company.  The "layout" (such as it is) of the repository is that if it's a startup project it goes in root directory of the repository, and if it's not a startup project it also goes in the root. If it's a non-startup project which has [companyName] at the start of its name then it goes in the top level of the [companyName] directory. Certain other non-startup projects live in [companyName], too, even if they don't have [companyName] in the title.  Trying to pull a project off the repository onto a new machine breaks the .sln file of the project because you lose whatever directory structure was on the original development machine. I've never been entirely sure whether I'm supposed to be creating a new .sln for each new machine or not, though, so maybe that's just my own screwup...  Anyway, basically, the "system", or lack thereof, that we have now is so obviously and blatantly broken and wrong that I can't even work out how we should be doing it other than "Not like this". I'd like to hear what the community's opinions are on how best to run a revision control system, what practices to follow, and links to any articles I should be reading in order to put together a proposal for switching to another, better-organised system.


Quotient of a Banach space $X$ gets quotient topology under standard norm induced from $X$.

Let $X$ be a Banach space and $Y$ be a closed subspace of $X$. Then there is a canonical norm on $X/Y$. I want to show that this norm induces quotient topology on $X/Y$. Any hint/solution? I was trying to show that $\pi :X\to X/Y$ is open, so we need to show that $\exists$ $\epsilon >0$ s.t. $B_{X/Y}(0,\epsilon) \subset \pi(B_{X}(0,1)).$ Can someone please help?


$a+bi\mid n \implies a^2 + b^2\mid n$ if $(a,b)=1$

This seems very simple, but I have not been able to come up with an answer to it.  Suppose $a+bi \mid n$ in $\mathbb{Z}[i]$, where $a,b \in \mathbb{Z}$ with $(a,b)=1$. Prove that $a^2 + b^2 \mid n$ in $\mathbb{Z}$.  My attempt was: $a+bi \mid n \implies \overline{a+bi}\mid n$ (otherwise $n$ is not an integer), and if we have that $(a+bi,a-bi)=1$ (or a unit) in $\mathbb{Z}[i]$, then by unique factorization this implies that $(a+bi)(a-bi)\mid n$. However, I found it difficult to prove $(a,b)=1$ in $\mathbb{Z} \implies$ $(a+bi,a-bi)=1$ in $\mathbb{Z}[i]$. Does anyone have a nice solution to this? Any solution is welcome. For additional context, this question came up as I was trying to prove that $\mathbb{Z}[i]/(a-ib) \cong \mathbb{Z}/(a^{2}+b^{2})\mathbb{Z}$ when $a,b$ are coprime in the integers. A way of doing this using natural injections is given in , where there are many very good answers. One way is to use the first isomorphism theorem with the canonical map $\mathbb Z \to \mathbb Z[i]/(a - i b)$, and I need to prove that the kernel of that map is $\langle a^2+b^2 \rangle$. In every answer I saw on this, the solution skips over that step, making me suspect that there's something very simple I'm missing.


Parsing JSON containing new line characters

In my website I try to convert a string to JSON which contains a newline.  JSON.parse('{"hallo":"line1\r\nline2","a":[5.5,5.6,5.7]}');   This produces an "Unexpected token" error. Do I need to escape that somehow?


How can I find the minimum possible difference between two floats

If I have a java float and I want to increment/decrement it by the minumim possible value how can I determine that value? I mean it is a difference if the value of the float is already a very large number like 3.4028235E38 or a very small number like 1.4E-45. In the first case to note any difference I need to subtract a far lager number as I would need to add to the second case right?


How do you recover from uninstalling apt?

I realized that, aside from a warning, nothing is stopping you from running  sudo apt purge apt   If someone did run that, how do you reinstall apt, because you no longer have apt to install with?


I want to know if this sentence is correct. Can we say "Most Legendariest ....."? If not, what is the alternative I can use? Thank you very much.


ubuntu 14.04 64bit on Virtualbox Windows 10 host

I installed the latest version of Virtualbox on a Windows 10 guest laptop, and when selecting the 'Create Virtual Machine' menu, it only shows 32-bit options for Linux.  How do I install Ubuntu 14.04 64bit on Virtualbox Windows 10 host?


How can I enable PAE on Windows 7 (32-bit) to support more than 3.5 GB of RAM?

I know that Windows XP 32-bit can be configured, through , to support more than 3.5 GB of RAM.  Is there a good tutorial to do this with Windows 7 32-bit?  As to why I don't simply use 64-bit Windows 7: The software for my Internet connection (cell phone-as-modem) will only work in 32-bit environments.


Specify again which Community bot process deleted a question

In the days of yore (i.e. before last Monday or so), on questions deleted automatically deleted by Community, one could see which process caused it to be deleted, e.g. RemoveDeadAbandonedQuestions. However, now it doesn't say that.  These reasons were nice; on  one can look for the specific reason to see which thing deleted the post and why, and it was just overall nice to have at least a wee bit of (vague) info about what the Community user was deleting questions for.  Can we get the ability to see these again? It was nice to have more info than that a thing deleted the post and a link to a whole big article.


Posting a File to an External rest API from Salesforce

I am looking to post a File to a rest api to be archived for retention purposes to an external repository from Salesforce. I have looked all over the place and I don't see a way to do this. I see ways to post FILES TO  I see ways to GET FILES from  Does anyone have any samples to POST a File or Files FROM Salesforce to an external API?


Brazil Visit Visa can take UK Transit Visa

My question is this that I have Brazil Visit visa, while traveling to Brazil my flight is connected from London to Brazil, in that case can I apply transit visa for UK to go outside? I have Pakistan passport.  Regards.!


Is the "half your speed" used in standing from prone your normal speed, or current speed?

At my last session, a scenario arose in which a character was attempting to cover ground as quickly as possible, but was knocked prone. On their next turn, they proceeded to stand up and Dash. This led to a moment of confusion while I attempted to figure out exactly how prone and Dash interact. The player commented offhand that standing from prone halves your movement and Dash doubles it, so the two cancel and they had 30ft to move that turn. Reading the rules, however, I interpreted things differently.  Dash When you take the Dash action, you gain extra movement for the current turn. The increase equals your speed, after applying any modifiers. With a speed of 30 feet, for example, you can move up to 60 feet on your turn if you dash. Any increase or decrease to your speed changes this additional movement by the same amount. If your speed of 30 feet is reduced to 15 feet, for instance, you can move up to 30 feet this turn if you dash. (PHB p192)    Being Prone [...] You can drop prone without using any of your speed. Standing up takes more effort; doing so costs an amount of movement equal to half your speed. For example, if your speed is 30 feet, you must spend 15 feet of movement to stand up. (PHB p190)  My interpretation is that your speed is constant - say, 30ft - and your movement is a separate quantity representing distance you can cover this turn. You start the turn with available movement equal to your speed, and then Dash adds another quantity to your movement, while standing up removes a quantity from your movement. Neither affect your speed. That means that this player starts with 30ft of movement, gains an additional amount equal to their speed (30ft) from Dash, then spends an amount equal to half their speed (30/2 = 15ft) to stand, leaving them with 45ft of movement available for this turn. In the end, they needed less than 30ft of movement to get into position to attack the bandit leader and the party all made it out alive, so it didn't affect the outcome of our game, but I'd like to get this straightened out for the future. Is my interpretation of the interaction between speed, movement, the prone condition and the Dash action correct?


I left an Indian cuisine frozen entrée out and I left for two weeks. Will I come home to maggots? I heard Frozen foods can't produce maggots. Please help!


How does "warp drive" not violate Special Relativity causality constraints?

I'm talking about this nonsense:   Now, I'm aware that there are problems with the practicalities (or possibilities) of methods involving exotic matter with negative mass, and that kind of thing has been addressed here:   But in this case my question is different and more specific. Sweeping all the other problems of constructing such a beast under the rug, wouldn't this violate causality?  SR says that the simultaneity and relative ordering of events is dependent on the relative motion of the observer, but that no matter how it works out, if event A causes event B, no observer will see B first. One of the many problems with FTL travel (or signals) is that if any information is sent faster than light, there will exist an inertial frame in which the signal arrives before it is sent, a blatant violation of causality. (I think we can all agree, can we not, that the threshold should be extremely high before breaking assumptions that we're in a causal universe?)  So how is any scheme to travel faster than light, even if it may locally satisfy the equations of GR, not a blatant violation causality according to SR?  Is my understanding of GR incomplete and there's something in it that obviates the causality implications of SR? Or am I correct that FTL claims should be dismissed with extreme prejudice on this basis alone? (Pending a serious replicable experiment showing causality to be breakable.)


User's suspension period has expired, but they're still suspended?

I came across a user with a notification that states:     This account is temporarily suspended network-wide. The suspension period ends on Dec 2 '18 at 2:35.   Screencap for posterity:    Unless this user is  (in which case the full year should be shown, or at least a tooltip), it seems like they should have been unbanned 4 months ago.


Is "Featured" the right text for the bounties tab?

On the Home page and Questions page, we have a tab for questions that currently have bounties. The tab reads "Featured". I've long wondered why we used "Featured" rather than something like... I don't know... "Bountied". I asked some of my coworkers and the response I got was      Someone typed "Featured" into a text file 10.5 years ago and it stuck, is my guess. ;)   Now, I'm not sure we've had bounties - or at least this tab - since the site first launched but that's being a bit pedantic. There may be a more official answer out there somewhere, but I figured I'd see what your thoughts were about changing it.   To be fair, I'm not sure that "Bounties" or "Bountied" sound particularly great but they do actually say what that tab contains, which "Featured" doesn't. On top of that, we use "Featured on Meta" to indicate questions that moderators or staff have tagged with the  tag, which don't have a bounty associated with them. Using the term in such different ways could be confusing to users.  The thing is, I'd like the option to use "Featured" for something else that's more similar to how it's used in relation to Featured Meta posts, which is why I'm asking this question.  Here's what the tabs look like on the Home page of Meta Stack Exchange:    Should we change this text to read "Bounties" or "Bountied"? or something else? Or should we leave it the way it is?  If something else, what? Promoted? A few ground rules - well, one: It needs to be the same length as "Featured" or shorter.


How can I add more cars to the Special Vehicle list?

I went to the Garage that isn't the one at the safe house. I noticed that there was a prompt to press D-pad Right to access Special vehicles. So a list of one car opened and I selected it. This spawned me outside in a Eleghy RH8. Now not matter what I do to the car, I can go back to the garage and spawn a new one (Nothing custom saved from the previous afaik). So this seemed like a good way to always have a car other than the standard your Character has.  What I want to know, I how do I increase that list? Is that where buying cars comes into it?  So if anyone has already increased that special vehicle list, Please let me know how you did it :).


Is the reverse of the “discrete logarithm problem” equally dificult?

It is not easy to understand why this becomes a hard problem.  The discrete logarithm problem as defined : “any integer k that solves $b^k = \{g\mod{n}\}$ is termed a discrete logarithm” i.e.: Finding an integer $k$ for $b$ and $g$ known in $b^k=\{g\mod{n}\}$  I wonder. Is the reverse, that is: Finding an integer $b$ for $k$ and $g$ known in $b^k=\{g\mod{n}\}$  equally difficult (equivalent), or there are easy ways to solve the later, and if so, how?  Edit:  analysis of “roots”. And  for n composite.  Edit: A  of the discrete logarithm problem is: “Discrete logarithms are perhaps simplest to understand in the group . This is the group of multiplication modulo the prime p.”  That was the initial intent of the question. But I realize that a general answer may be more apropiate.


How can I prove that $f′(x) = f ′ (- x)$

Prove that if $f$ is an odd function, then $f ′ (x) = f ′ (- x)$.


Help with set theory proofs ((For all A, B ⊆ X: f ( A \ B ) = f ( A ) \ f ( B ))  f is injective)

Edit: by now I've figured out i<=>ii! Just not iii<=>i  For an assignment I need to prove the following: i<=>ii<=>iii. My approach was to prove i<=>ii and i<=>ii. I'm mainly getting stuck on the 'iii<=>i' parts here.  (i) f is injective  (ii) For all A, B ⊆ X:  f ( A ∩ B ) = f ( A ) ∩ f ( B ).  (iii) For all A, B ⊆ X: f ( A \ B ) = f ( A ) \ f ( B ).  I saw a proof like this before, but I did not really understand all of the answers, and as the question was posted years ago, I thought it'd be better to post my own question.


How to factor $5$ in $\mathbb{Q}[\sqrt[3]{2}]$?

I'm learning to use PARI/GP and would like to factor the number $5$ in the number field $K=\mathbb{Q}[\sqrt[3]{2}]$   Can someone help me interpret the output?  ? K = nfinit(x^3-2); idealfactor(K,5) %4 = [[5, [ 2,  1, 0]~, 1, 1, [-1, 2, -4; -2, -1, 2; 1, -2, -1]], 1;        [5, [-1, -2, 1]~, 1, 2, [ 2, 0,  2;  1,  2, 0; 0,  1,  2]], 1]   This is supposed to be a factorization of $(5)$ into ideals, but also I'd like to see a factorization into numbers in $\mathcal{O}_K$ if possible.    I can say just a little bit more  ? K = nfinit(x^3-2); ? P = idealprimedec(K,5) %1 = [[5, [2, 1, 0]~, 1, 1, [-1, 2, -4; -2, -1, 2; 1, -2, -1]], [5, [-1, -2, 1]~, 1, 2, [2, 0, 2; 1, 2, 0; 0, 1, 2]]]  ? P = idealprimedec(K,5); ? [p1,p2]=P;  ? p1 %2 = [5, [2, 1, 0]~, 1, 1, [-1, 2, -4; -2, -1, 2; 1, -2, -1]] ? p1.e %3 = 1 ? p1.f %4 = 1 ? p1.gen %5 = [5, [2, 1, 0]~]   and some notations (from the PARI/GP )     The result is a vector of prid structures, each representing one of the prime ideals above p in the number field nf. The representation pr = [p,a,e,f,mb] of a prime ideal means the following:          a is an algebraic integer in the maximal order $\mathbb{Z}_K$ and the prime ideal is equal to $\mathfrak{p} = p \mathbb{Z}_K + a \mathbb{Z}_K$;    e is the ramification index;    f is the residual index; finally,    mb is the multiplication table attached to the algebraic integer $b$ is such that $\mathfrak{p}^{-1} = \mathbb{Z}_K  + b/p\mathbb{Z}_K $  which is used internally to compute valuations. In other words if p is inert, then mb is the integer 1, and otherwise it is a square t_MAT whose j-th column is b.nf.zk[j].      This say something like, as ideals in $\mathbb{Q}(\sqrt[3]{2})$: $$ (5) = \big(2 + \sqrt[3]{2}+{\color{#CCCCCC}0}\sqrt[3]{4},5\big)\times\big(-1 - 2\sqrt[3]{2}+\sqrt[3]{4},5\big) $$  This is a different set of generators than the linked question so there might be a chance to re-open. these are basically the same generators as in the previous question.


I'm having difficulties understanding the following example I created.  The variable glob_var gets changed inside the test() function, but the original value remains outside of the function:  test() {   read var   glob_var=$var   echo '$glob_var in test(): '$glob_var  }   glob_var='org' echo '$glob_var start: '$glob_var echo new | test echo '$glob_var end: '$glob_var   Output  $glob_var start: org $glob_var in test(): new $glob_var end: org   I'm suspecting that the pipe starts a new process. If that's the case, what would be an alternative way to retrieve values from the test function?


How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess ends with code !=0?

How to wait in a bash script for several subprocesses spawned from that script to finish and return exit code !=0 when any of the subprocesses ends with code !=0 ?  Simple script:  #!/bin/bash for i in `seq 0 9`; do   doCalculations $i & done wait   The above script will wait for all 10 spawned subprocesses, but it will always give exit status 0 (see help wait). How can I modify this script so it will discover exit statuses of spawned subprocesses and return exit code 1 when any of subprocesses ends with code !=0?  Is there any better solution for that than collecting PIDs of the subprocesses, wait for them in order and sum exit statuses?


I notice Xubuntu can let me change the opacity of inactive windows, which seems nice for having small videos playing while showing my terminal below. But it quickly gets annoying when doing anything else – I don't want every inactive window transparent, and I'd rather not go into settings all the time to turn it off. Can I just set it for one window?  (Bonus points for turning it into a script that can both set transparancy, always-on-top, and remove window decorations)


Change style of labels of Tikz nodes of a given style

How can all labels of a given type of node be restyled in Tikz?  Imagine that there are nodes of different styles, and that only the nodes of style X should have red labels. Is this possible without having to change all labels one by one of nodes of style X?


There have been quite a few plane crashes the past week and this question popped into my head of which I need a good explanation in science about the possibility of survival or not and why.   Assuming I am on a plane that is quickly losing altitude, just before the plane hits the ground I jump off the plane.   Is it even possible to jump? If I can jump, will the gravitational pull be different and thus make me survive? Would this be equal to jumping off the ground? (Assume that I am immune to the plane explosion)


I've done ab bit of web-searching and found nothing. Are there any attempts on using CSS for LaTeX formatting? For example:  body { font-family: Helvetica,Arial,sans-serif; } section { font-size: 16pt; } /* or: */ h1 { font-size: 16pt; }   I know that this approach is limited compared to the classic approach, but it could be a nice attempt. So are there any published papers or code pieces?  I'd like to write in the preamble of my LaTeX document: \usestylefile{foo.css} and have the text rendered as written in the given style file (and its linked style files).


What is difference between "for(vector::iterator it=a.begin();it!=a.end();it++)" and "for(vector::iterator it=a.begin();it!=a.end();++it)"

sometimes I see  for(vector<int>::iterator it=a.begin();it!=a.end();it++){ }   and sometimes   for(vector<int>::iterator it=a.begin();it!=a.end();++it){ }   It seems no difference when I try to print some vector to test, but not sure if it has some difference in side effect, is there any difference between them?


Why aren't locked posts viewable in the Questions list?

I can't seem to find my locked ee.SE question anywhere on the Questions list on EE.se, despite it showing up on the Hot Questions list on SE and the active list on All Questions.  Is this just a bug or something?


I have a list which contains SelectListItem, I am making dropdownList for it. This is my list element's  1 Declined 2 Bad Phone 3 Medical 4 No Answer 5 Try Again 6 Left Voice mail 7 Skip  8 Not Valid 9 Warning 10 Unemployed   The list is sorting according to their values(I have shown values next to the item) I have to display elements like this  5 Try Again 7 Skip  6 Left Voice mail 3 Medical 8 Not Valid 1 Declined 2 Bad Phone 4 No Answer 9 Warning 10 Unemployed   ie in Random Order, How can I do this Random sorting in List, One thing I can do is to find index of each item and change its index/position,but it will be a hectic. The List items are fixed and are not dynamic.


I noticed that the Community user can create tags. For example, the Community user  the  on Stack Overflow. When does the Community user create a tag?


I have a 2-class problem involving many features. Does a linear support vector machine (SVM) classifier only take into account the values of these features and nothing more? Does it see the relationships between the variables? For example, does it work like this: if feature number 80 is "0", then feature 2: needs to be over 0.2 for class 1 and if feature number 80 is "1" then feature 2: needs to be over 0.8 to be in class 1? Does it do it with many variables at once, and do the values of other variables influence how the SVM is influenced by other variables?


Probability of getting two pair in poker

I was looking at this website  and I read the explanation for how to calculate the probability of getting a full house.  To me, the logic basically looked like you figure out the number of possible ranks and multiply by the number of ways to choose the cards from that given rank.  In other words, for a full house $P=$ $$\frac{{13\choose1}{4\choose3}{12\choose1}{4\choose2}}{52\choose5}$$  Following this logic, I tried to calculate the probability of getting two pair.  My (incorrect) logic was that there are 13 possible ranks for the first pair and $4\choose2$ ways to choose two cards from that rank, 12 possible ranks for the second pair and $4\choose2$ ways to choose two cards from that rank, and 11 possible ranks for last card and $4\choose1$ ways to choose a card from that rank.    So I tried $P=$ $$\frac{{13\choose1}{4\choose2}{12\choose1}{4\choose2}{11\choose1}{4\choose1}}{52\choose5}$$  Obviously my solution was incorrect.  I read explanation and the correct answer is $P=$ $$\frac{{13\choose2}{4\choose2}{4\choose2}{11\choose1}{4\choose1}}{52\choose5}$$  I'm still a bit fuzzy on where I went wrong though.  Can anyone help me understand this problem a little better?  Thank you very much for your help.


I'd like to be able to do the following in the search box:  shell [cmd] [-linux]   to search for "questions containing the 'shell' term AND having the 'cmd' tag AND NOT having the 'linux' tag"  Note that "shell" is not a TAG !


I just started with motion tracking in blender and it a really awesome feature but I discovered that shooting the right video is very hard.  The image below is a part of I test video I made where I moved my phone from left to right and than to the left again. Like you can see on the image, all the tracking points on the left are useless for blender and it is really hard to works with only the right part of the video.  My question is: has somebody tips about how to shoot a good video for motion tracking?  Should you just walk around an object with some good marks instead of moving the camera from left to right like I did.


i have installed Ubuntu 14.04 in dual boot with windows 8.1 and want to know as to if ever in future if i need to remove Ubuntu . how will i do that? please help.


How to uninstall Garena Plus from Ubuntu 12.04

Ok guys so I downloaded and installed garena plus with wine but something wasn't working so now I want to uninstall it. I'm new on Linux and it's hard for me to figure out where the application is installed. Please help me


Maximal points on an $n$-dimensional ellipsoid

For an $n$-dimensional ellipsoid in $\mathbb{R}^n$ centered at $\mathbf{0}_n$, defined by a set of vectors $\mathbf{v}_i$ giving the directions of the principle axes and $\lambda_i$ representing the corresponding magnitudes of each axis (for $i=1,\ldots, n$), is there a straightforward way to work out the maximal $x$-coordinate, for example, on the ellipsoid?  $\textbf{2D case:}$    For the 2D case let $\mathbf{v}_1=\left(x_1,\;y_1\right)^T$ with $\lambda_1=a$ represent the major axis and $\mathbf{v}_2=\left(x_2,\;y_2\right)^T$ with $\lambda_2=b$ represent the minor axis.  Here the geometry is not too complicated.  We can define a parametric equation for the x-coordinate of the curve in terms of an angle $t$ as $$x=a\cos(t)\cos(c)-b\sin(t)\sin(c)$$ which with some basic calc and trig can be shown to be maximized at $$ x_\text{max} = \frac{a^2\cos(c)^2+b^2-b^2\cos(c)^2}{a\cos(c)\sqrt{\frac{a^2\cos(c)^2+b^2-b^2\cos(c)^2}{a^2\cos(c)^2}}} $$  Similarly a maximal point for $y$ can also be obtained.  $\textbf{General case:}$  For the general case, however, I am stumped. I imagine an analytic result is pretty difficult, so any advice on a numerical approach for finding such a solution in general would also be appreciated.


I'm getting and object from an api that looks like this -  data = {    ...    filter: "[1,2,3]"    ... }  Now, i want to take that string of array and convert it to array of numbers, that is [1,2,3].  Thanks a lot


How to find all of X's answers to Y's questions?

Assuming their existence, how would I find all instances in which user X answered Y's question? I tried: user:X user:Y but this fails.


Getting 2-factor Gmail authentication code from USA mobile number

I have been facing a serious problem for many months. Usually I get a 2-factor authentication code from 51501 when I am supposed to log into Gmail. But for months I am getting a code from a USA-based mobile number: +15155327373. When I call this number, the ring goes on and on and no one picks up, I am facing this problem since October 2015.  There is also a mobile number from Sweden - +46701327805 that sometimes sends the code. I change my passwords every time this happens. What could be the possible reason for this and how to overcome this problem?  By the way, - I must say I have been hacked for years. - I don't use VPN; my internet runs off a broadband modem.


I am trying to change my Minecraft version on my newly installed Minecraft launcher but no versions appear, even when I go into installations > new > version.


Pointwise limit of the sequence of continuously differentiable functions defined inductively.

Let $f_1 : [-1, 1] \rightarrow \mathbb{R};\: f_1(0) = 0 $ be a continuously differentiable function and $\lambda > 1$. Consider the sequence of functions defined inductively by $f_k(x) := \lambda f_{k-1}\left(\dfrac{x}{\lambda}\right);\: k \geq 2;\: x\in [-1, 1]$. Find the pointwise limit of the sequence of functions $(f_n)$.   I figured out that $f_k(0)=0 \:\forall\: k\implies f_k\rightarrow 0 $ when $ x=0$. Also $f_k$ is continuously differentiable $\forall \:k$.   $\Bigg($Since $\quad\displaystyle\lim_{h\rightarrow0}\dfrac{f_2(x+h)-f_2(x)}{h}=\lambda\lim_{h\rightarrow0}\dfrac{f_1\left(\frac{x+h}{\lambda}\right)-f_1\left(\frac{x}{\lambda}\right)}{h}.\: $Since$ f_1 $is continuously differentiable we see $ f_2 $ is differentiable and its derivative is continuous and hence $f_k$. $\Bigg)$.  Further since $f_1(0)=0$. So I assumed $f_1(x)=x\cdot g(x)$, where $g(x)$ is continuously differentiable and $g(0)\neq0$. Assume $x\neq0,\:f_2(x)=\lambda\cdot\dfrac{x}{\lambda}g\left(\dfrac{x}{\lambda}\right)=x\cdot g\left(\dfrac{x}{\lambda}\right)\implies f_3(x)=x\cdot g\left(\dfrac{x}{\lambda^2}\right)$ $\implies f_k(x)=x\cdot g\left(\dfrac{x}{\lambda^{k-1}}\right)$.   So taking limit as $k\rightarrow \infty$, we get $\displaystyle \lim_{k\rightarrow\infty}f_k(x)=x\cdot g(0)$. Now I am not sure how to proceed or whether there is something wrong here. Please provide hints or suggestions.  $\rule{17cm}{1pt}$  To sum up (using the arguments made by $\textbf{zhw}$ and $\textbf{Paul Frost}$)  When $\displaystyle x\neq0, \lim_{n\rightarrow\infty}f_{n+1}(x) = \lim_{n\rightarrow\infty}x\,\frac{f_1(x/\lambda^n)}{x/\lambda^n} = \lim_{n\rightarrow\infty}x\,\frac{f_1(x/\lambda^n)-f_1(0)}{x/\lambda^n}=x\:f'(0).$ Thus  $$f_n\rightarrow\begin{cases}0&x=0\\x\:f'_1(0) &x\neq0\end{cases}=f $$


How to rename chapters in Table Of Content in French document?

My document is in French. I added appendices to the document, appendices use \chapter{}, hence I would like that these chapters to be names "Annexe" (which is the French word for "Appendice" in table of content. But I my current document I don't manage to do that. I expect it has to do with the cutomization of my table of content. Which I want to keep as well. working example: %Preamble \documentclass[a4paper,french,oneside,openright]{book}  \usepackage[french]{babel}  \usepackage{hyperref} \hypersetup{     colorlinks=true,     linkcolor=blue,     filecolor=magenta,           urlcolor=cyan } \usepackage{lastpage} \usepackage{lipsum}  \usepackage{tocloft,calc} \renewcommand{\cftchappresnum}{Chapitre } \AtBeginDocument{\addtolength\cftchapnumwidth{\widthof{\bfseries Chapitre }}}   \usepackage{datetime}  \usepackage[toc]{appendix} \begin{document}      \tableofcontents      \part{main}     \chapter{Lorem ipsum}     \lipsum[1-2]       \renewcommand{\appendixname}{Annexe} \renewcommand{\appendixtocname}{Annexe} \renewcommand{\appendixpagename}{Annexe}  \part{appendices} \begin{appendices}     \chapter{Some appendice}     \lipsum[1-2]     \chapter{Some appendice}     \lipsum[1-2] \end{appendices}  \end{document}   I know that this question has been closed and pointing to  but that didn't help me at all. Another answer is marked as solutions under this question. That one helped me solve the issue.


I have Windows and Ubuntu both installed in my laptop. Recently, during Windows installation when the computer took an update, the whole computer broke down. I had to fix the boot loader with Boot-Repair from a live Ubuntu USB. I have Ubuntu back, but after repair it is no longer possible to login into Windows. I checked my HDD with GParted, and it was showing errors in the Windows partition and also other NTFS partition. I am trying to fix the partition with the following commands but still having this error.   rashed@rashed:~$ sudo ntfsfix /dev/sda2 Mounting volume... OK Processing of $MFT and $MFTMirr completed successfully. Checking file system overflow... FAILED Error: Failed to fix the alternate boot sector   Is there a way to fixed the problem?


Any idea what was the final verdict in DS9

In , The whole serie is centered around "". Through the show there are questions about what they are and what they can do.  At first,  (The Emissary) think of them as "The wormhole aliens". The more we go through the show the more we see that Sisko slowly change his vision about these Prophets.  I know it starts a little sooner then this but, in  (season 5, episod 10):      Sisko uncover an ancient Bajoran artefact wich seemed to have "led"  him to it, latter in the episod, Sisko starts to have vision and he  literally embraces his role as The Emissary   In  (season 6, episod 21) :       and  are being "possessed" by the   (Sisko) and The Prophet (Kira).   In  (Season 6, episode 26):      Dukat comes across an ancient Bajoran artifact, he breaks it while  chanting a sort of incantation and then the spirit of a  Pah-Wraith enters him.   In  (season 7, episode 1):      Sisko learns that a Prophet came to earth in the exact purpose of  created him as the future Emissary.   There is a number of other examples but I think these 4 will suffice. After reading this (and knowing that these creatures live outside linear time):  Is there any final statement as exactly what these creatures are and (if so) what kind of technology are they using and again just how far their powers extend ?


Let $a_n$ be a sequence such that: $ a_{n+1}-a_n  \ge \frac{1}{n}$. prove that $\lim_\limits{n \to \infty} a_n = \infty$.  SOLUTION: I want to prove this by disproving Cauchy's test. which means, I want to prove that:  There is an $\epsilon>0$ , such that for each $N$, there is $n>N$ and $p \in$  $\mathbb N$ such that:$|a_{n+p}-a_n| \ge \epsilon$.  but for some reason I couldn't find that $\epsilon$. the "$\frac{1}{n}$" made my job harder.   To conclude: I want to disprove that $a_n$ converges by disproving that its Cauchy's and from $ a_{n+1}-a_n  \ge \frac{1}{n}$ we get that the sequence is monotonic increasing, thus, this will prove that: $\lim_\limits{n \to \infty} a_n = \infty$.  Am I on the right track? are all the conclusions that I've reached are right? How do I really complete this? any kind of help would be appreciated.


i'm having trouble with a validating a simple contact form (name, email, message). I have managed to use PHP to actually send the message to my email, however you can just enter in random words for the email and it will send. There no way to filter this, I want a valid email to be entered not just jibberish. Not quite sure what I'm doing wrong as I'm quite new to PHP. Also a way to perhaps stop spam/being hacked would be great too.  <?php   if ($_SERVER["REQUEST_METHOD"] == 'submit') {   if (empty($_POST['name'])) {     $nameErr = "Name is required";   } else {     $name = test_input($_POST['name']);     // check if name only contains letters and whitespace     if (!preg_match("/^[a-zA-Z ]*$/",$name)) {       $nameErr = "Only letters and white space allowed";     }   }    if (empty($_POST['email'])) {     $emailErr = "Email is required";   } else {     $email = test_input($_POST['email']);     // check if e-mail address is well-formed     if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {       $emailErr = "Invalid email format";     }     if (empty($_POST['message'])) {     $message = "Message is required";   } else {     $message = test_input($_POST['message']);   }  }  function test_input($data) {   $data = trim($data);   $data = stripslashes($data);   $data = htmlspecialchars($data);   return $data; }  if (isset($_POST['submit'])) {    $name = $_POST['name'];    $subject = $_POST['subject'];    $emailFrom = $_POST['email'];    $message = $_POST['message'];     $emailTo = "domain@domain.com.au";    $headers = "From: ".$emailFrom;    $txt = "You have received an email from ".$name.".\n\n".$message;      mail($emailTo, $subject, $txt, $headers);    header("Location: index.php?mailsent");  }  ?>   And the HTML.   <form class="contact-form" action="contactform.php" method="post">

               Name

               <input type="text" name="name" placeholder="Your name" required>

               Email

               <input type="text" name="email" placeholder="Your e-mail" required>

               Subject

         <input type="text" name="subject" placeholder="Subject">

               Message

               <textarea name="message" placeholder="Message"></textarea>                <button type="submit" name="submit">Send Mail</button>

      </form>   As mentioned I can successfully send myself an email but the validation doesn't work. After I hit submit it just displays the php code.   Any help is really appreciated and if you could suggest some good resources/books to learn php that'd be great too.  Thanks!


I'm trying to install gimp 2.7.3 from the repository of launchpad ppa:matthaeus123/mrw-gimp-svn, but when I try to install, it installs the package gimp with the 2.6 version instead of the 2.7, but the others libraries are installed with 2.7.3. There's an error? How I can install it?