A matrix is positive if and only if it is Hermitian and its eigenvalues are positive

I want to show the equivalence of two definition of positivity. Let $A \in \mathcal{L}(H)$, where $\mathcal{H}$ is the $n-$dimensional Hilbert Space $\mathbb{C}^n$. $A$ is positive if $\langle x,Ax \rangle \geq 0 $ for all $x \in \mathcal{H}$.     Show that $A$ is positive if and only if it is Hermitian ($A=A^*$) and all its eigenvalues are positive.   It is a classical exercise to show that . The difference in this question is that one only assumes the operator is positive and has to deduce that it is Hermitian and its eigenvalues are positive, which cannot be solved using the same approach.


Send users to the correct site's tagged questions from the SE search results

In the search results of stackexchange.com/search?q=*, allow people to click on a tag and go to that website with the tag page open.   For example,  shows me this:        But clicking on the hovered-on tag takes me to  and the panda.   Instead, it should take me to    The math.SE URL is already there in  /#question-summary-608993 > div.summary > div.started.fr > a #question-summary-608993 > div.hot-question-site-icon > a


Linker error reference to function not found

Can someone let me know what the problem might be here? It seems the linker can not find the min function although it should be able to find it in def.o.


Is there a verb to describe the act of telling a lie unintentionally?  Lying is not telling the truth intentionally as far as I know, but what if someone makes a mistake when telling a testimony in court or forgets a certain detail when describing something unintentionally?


Let $f(x,y) = (y-x^{2})(y-2x^{2})$. Show that on any straight line through $(0,0)$ $f$ has a minimum at $(0,0)$, but that $f$ itself doesn't have a minimum at $(0,0).  This is a question from my multivariable analysis course. Currently it is still early in the semester and we've only finished discussing continuity. Following is my attempts(or lack of) to the two parts of the question:  a) straight line  For this part I simply said, let $y = cx$ for some constant $c$. From there I got $$f(x,cx) = c^{2}x^{2} - 3cx^{3} + 2x^{4}$$ after simplifying. So from calculus in order to find a minimum we would have to calculate the derivative and find any critical points, since this is now a function in one variable I can do that: $$f'(x) = 2c^{2}x - 9cx^{2} + 8x^{3}$$. Fortunately the point we are studying the behaviour at, $(0,0)$, is a critical point and we don't have to do any algebra. TO test the behaviour of the slope to the left and right of $0$ you just choose candidate points. We choose $-1$ and $1$ and they show: $$f'(-1) = -(2c^{2} + 9c - 9) \\ f'(1) = (2c^{2} + 9c - 9)$$  More importantly regardless of the value of $c$ the signs on the values do not change. So the function slopes downwards to the left of $0$ and slopes upwards to the right of $0$. This shows us that $(0,0)$ is a minimum along any straight line.   b) the function $f$ itself  This is where the trouble starts. I've done a course in multivariable calculus before so the only way I know of to obtain the minimum would be through taking the partial derivatives and calculating the Hessian. But there is no way this can be what is expected of us because we are nowhere near "defining" multi-dimensional derivatives. So this being the case, how would I approach this problem?


Can't install htmlhelp.exe (HTML Help Workshop) because of error on Windows 10

When I download HTML Help Workshop from Microsoft, the first part is a success, but after 2 boxes this appears:     Error creating process      C:\Users\AWAKE_~1\AppData\Local\Temp\IXP000.TIMP\setup.exe      Reason: The requested operation requires elevation.   What do I do to fix this and what caused it?  By the way, I have a 64-bit operating system and a x64-based processor. Thanks!


Currently each site has it's own reputation rating which shows either expertise or trust in a particular user. This rating is useful for a number of things first of all it gives a number of rights to users second of all it allows us to place bounties and thirdly it shows an "expertise" number of how good a particular user is in a particular subject.   The fact that each site offers it's own reputation does however have some consequences:    I'm unable to offer bounties on different sites, I have quite a bit of reputation built up on Game Dev however I often find myself with problems on Stack Overflow, this means that I cannot use my hard earned reputation on Game Dev to help me resolve my problems (they would be off topic there).   Reputation represents trust, currently many privileges are bound to your level of reputation, this mean that a user can be trusted with full moderator rights on one site yet only have 101 reputation on another not even allowing him to review users first posts.    The solution:  make a single global tracker of all reputation displayed besides the current reputation meter on each site, this global reputation can be used as an alternative supply of reputation for bounties at a lower exchange rate (say 2 reputation for each point offered in bounty and can be used to unlock a number of privileges (but not all)). This would mean that a user who is very well known and in high regards on one website can actually do more then a user who spend a single afternoon on a particular website.


Many people have begun to use the word "word" seemingly as an exclamation point or as a means to be emphatic.    Where and why did this begin?


how to add more elements on button click

I have a <div> containing multiple <article>-tags. Now I want to add a button, which shows more entries by each click. Lets say I display 5 as default, then I click the show more button, then I get 10 entries, then I click again and I get 15 entries.  The HTML structure is pretty simple:  <div>   <article> data here </article>   <article> data here </article>   <article> data here </article> </div> <button>show more</button>   Thanks in advance...


Could we have a SE for software/hardware recommendations?

In a perfect world, the so-important advice "do not reinvent the wheel" would be extensively followed. In practice, everyday millions of wheels are reinvented simply because someone didn't know an existing solution for a specific problem. The best way to find a library, today, is googling it, but it's not always obvious which keywords to use. The lack of a tool for finding solutions is very counterproductive for the dev world as a whole. Stack Overflow is not very receptive for recommendation threads. So what about a new SE for it?


Can I change the default excel time format from mm:ss.0 to mm:ss.000?

I work with a lot of datasets from outside sources with times in the format mm:ss.000.  As such I'm constantly copying them into new workbooks, where excel will display the relevant columns as mm:ss.0.  Changing them is simple enough and quick enough, but my life would be fractionally better if I could make it DEFAULT (in any new workbook) to three decimal places.  This is about TIMES, not DATES, and because I'm talking about fractions of a seconds it's not possible to do via the locale/region settings in Windows' Control Panel.  At least, I don't think it is? Possible?  Update:  This question is different from this , as in regional settings it's not possible to choose a time format with decimals of a second.


I am sorting my nomenclature as suggested by the nomencl package documentation, but \dot{q} is being sorted before a and v, where as the desired sort is:   a \dot{q} v   The existence of a default prefix does not help, so noprefix is used. Prefixes are used to separate Roman [1] from Greek [2] variables.  \documentclass[oneside,paper=a4,fontsize=12pt,english]{scrreprt} \usepackage[noprefix]{nomencl} \makenomenclature \begin{document} \printnomenclature \nomenclature[1]{\(a\)}{Semimajor axis} \nomenclature[1]{\(v\)}{Velocity} \nomenclature[1]{\(\dot{q}\)}{Heat flux} \nomenclature[2]{\(\rho\)}{Density} % makeindex.exe Test.nlo -s nomencl.ist -o Test.nls Lorem ipsum. \end{document}   Using [1q] as a prefix causes \dot{q} to be sorted at the end of the Roman variables. How can I get nomenclature to ignore \dot{}?


CPU cooler does not fit, will it cool worse if I cut tips of heatpipes off?

Case: zalman z9 neo  Cooler: deepcool gammaxx 400  According to specs it should fit, but it does not, probably because my motherboard is mini-itx and cooler located a bit to the left  I'm thinking that cutting off those tips of heatpipes on the left would solve that; if I do that, will cooler work worse, like heatpipes would transfer heat not as good or something?


How can I run a consistency check on my removable MicroSD card?

I own an Android device with a removable MicroSD card. The card uses either FAT32 or ExFAT technology. These are "non-journaling filesystem" technologies, so the data on the cards can become corrupted in certain cases.  Perhaps I should run a consistency check (e.g. fsck / Chkdsk / ScanDisk) every so often.  How can I run a consistency check on my MicroSD card, without having to plug the card into a PC?


In the Deathly Hallows Part 2 when Harry was looking in the Pensieve he saw a lot of things but one of them was of voldemort killing Lily. His face was white. Why was it white if he didn't lose his body yet? He also didn't have a nose.


Cancel/kill window.setTimeout() before it happens

I have a few places where I use the line below to clear out a status, for example.  I have a few of these that hang out for 10 seconds or more and if the user gets clicking around the action can occur at incorrect time intervals.  window.setTimeout(function() { removeStatusIndicator(); }, statusTimeout);   Is it possible to cancel or kill this with some jQuery or JavaScript code, so I don't have this process hanging around?


prove by cases that $|r + s| \leq |r| + |s|$ for all real numbers.

Prove by cases that $|r + s| \leq |r| + |s| $.  I'm new to proofs and picked up a discrete math book and I can't seem to figure out how to go about solving this.  Any help would be appreciated.


My rep on SO went up by 50 just after the site was offline. It says that I get  +50 for the question  (deleted, 10K only) but I clearly didn't.


How can i join different Faces, to texturize them better?  Example:


Regular expression to find string inside curly brackets Javascript

I am trying to get a substring which is inside curly brackets by using regular expression.  Assuming that I have the following string:   "This is a {nice} text to search for a {cool} substring".   I'd like to be able to search for nice and cool


Editing Microsoft Word Documents in Google Drive

So, I installed "Backup and Sync" (the replacement for deprecated "Google Drive for PC") and created an MS Word Doc in the drive folder. I understand that I can edit this word doc from any PC where I have set up and synced my docs using "Backup and Sync".  But what if I want to edit this word doc (saved in my Google Drive from any other PCs that don't have "Backup and Sync"?  I tried to open the doc using online application. It made a copy of the document and changes were saved to the copy only. Is there any way to sync back those changes to the original word document?


function: return an array containing every word in the string or empty array if string is empty

I've been tasked with writing a function called "getAllWords".  Given a sentence, "getAllWords" returns an array containing every word in the sentence.   Notes: * If given an empty string, it should return an empty array.    What I've come up with is:  function getAllWords(str) {   var array = [];   for (var i = 0; i < str.length; i++) {      array.push(str[i]);    }    return array;    }     getAllWords('Radagast the Brown');   What I get is:    [ 'R','a','d','a','g','a','s','t',' ','t','h','e',' ','B','r','o','w','n']   but what I'm trying for is:      ['Radagast', 'the', 'Brown']


How to check if a **program** version is equal to or smaller than x

I'm writing a shell script that has to know if a certain program version is less or equal to version x.xx.xx here is an example script to try and explain what I want to do: #!/bin/bash  APPVER="`some command to output version | grep x.xx*`"  if [[ "$APPVER" is smaller or equal to "x.xx*" ]]; then     do something else     do something else fi  is there a way to do that? I found ways to compare numbers, but they won't work with version numbers. I need a solution that uses no or as little as possible programs. any help is appreciated!


Let $q$ be a prime and $n\ge 2$ an integer. Moreover, define $f_q(n)$ as the number of $q$-th residues modulo $n$. Is it true that if $K$ is a positive constant then there exist infinitely many $n$ such that $$ f_q(n)\le Kn? $$    I would like to add that the result holds if $q=2$, indeed it is known that $$ \limsup_{n \to \infty}\frac{f_q(n)}{n}=\frac{1}{2} \,\,\text{ and }\,\,\liminf_{n \to \infty}\frac{f_q(n)}{n}=0. $$


$S$ is continuous with Weak * topology from $Y^*$ to $X^*$ if an only if $S=T^*$ for some $B(X,Y)$

How to prove that prove that $S$ is weak$^*$-continuous from $Y^*$ to $X^*$ if  an only if $S=T^*$ for some $T\in B(X,Y)$  Thanks for any hints.  To show that  $T$ is continuous is straight forward but inverse is hard.


When I open Ubuntu Software, it shows me that there are some updates which have to be done. But after clicking them for several times, the installation process just doesn't work. I also tried to restart.    If I use the Software Updater it tells me this message:    If I click OK, the update ends. If I click settings all options are checked:    This whole update process was really not user friendly developed. Do you know what can be done else? I also tried the terminal sudo apt update sudo apt upgrade, there are still undone updates in the Software Center and the Software Updater!  The output of the terminal is:  W: GPG error: http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_16.04  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E: The repository 'http://download.opensuse.org/repositories/isv:/ownCloud:/desktop/Ubuntu_16.04  Release' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.   PS: Who has marked this as duplicate? The so called duplicate is about why is Ubuntu Software showing these updates? Should I install them? My question is about how to install them? I can't install them because it doesnt work!  SOLUTION: For me the terminal, the software-center etc failed, but Synaptic Package Manger worked! Even if it makes no sense at all, because all these apps do the same thing. I hope Ubuntu could explain this to me.


40s/50s short story about a mutant family with psi powers

I'm trying to recall a story I read in the 1960s or 1970s, but which I suspect was older than that.  It was about a quasi-immortal family in the twentieth century who lived in a rural area and kept a low profile. It was a stand-alone story and only the family, and perhaps distant relatives, had unusual powers. I don't think they were aliens, just some offshoot of humanity.   They were of varying ages, ranging from relatively young to thousands of years old. They had lived in Europe before immigrating to the American colonies. Each person had a distinctive set of psi powers, ranging from the grandpa, pa, ma and son. I believe the youngest, just called Baby, was the most powerful and least human looking, and lived in the attic. He slept most of the time.  Nothing remains in my memory of the plot.  As I recall, the story had a Theodore Sturgeon feeling to it, with a humorous, ironic touch, but it probably wasn't his. I haven't been able to identify it from looking at a list of his works.  I probably read it in an anthology, but I might have seen it in an old magazine. I'm just not sure.  If anyone can help me identify it, I'd be grateful. Then I can scratch that mental itch.


Garlic: minced, crushed, chopped, sliced. When to use each one, and what is the difference?

I’ve seen, in many recipes, that the usage of garlic varies a lot.  For example: Meaty sauces normally require that the garlic is chopped and fried before the meat is added.  Neapolitan Pizzas usually add sliced, raw garlic in very thin slices to be cooked with the pizza  Some other sauces require crushed garlic to be crushed and fried (generally with onion) before adding other ingredients.  I’ve seen as well some recipes calling for a garlic paste, made with some salt and knife skills.  Lately, I’ve been using very thin slices of garlic added in the beginning/middle of the cooking process of the sauce.  My question: What is the difference between dicing, slicing, crushing, or making a paste? What is the difference between frying the garlic before or adding it to the cooking sauce? Which one adds more flavor?  Thanks in advance.


Can I use a Canada visa in a cancelled passport?

I have an e-Visa for Canada in a passport that was damaged. I applied for and received a new passport. Can I still use the approved visa for Canada, or do I have to apply for a new one?


I just started learning Blender and something happened. I have couple objects Cube, 2x Planes and Camera. But now all objects but Cube disappeared. If I choose them (in the right side panel), they have location, scale, dimension, but I can't see them. There is one thing I noticed. When I choose Cube (only visible object). In the properties panel is Item. But when I choose any other object the Item is not visible.     EDIT: thanks it was the / on numpad, just find out that regular / is not the same as numpad / And because my notebook does not have numeric keyboard I had to use Fn.


Is it possible to extend Urysohn's lemma to $C^1(X)$?

So what I mean precisely: take $(\mathbb{R}, \mathcal{T}_{eucl})$ can we find a function $f$ for every closed $A, B \subset \mathbb{R}$ such that $A \subset f^{-1}(\{0\})$ and $B \subset f^{-1}(\{1\})$ and $f'$ is continious?  I think this makes sense because we can find a continious function $f$ such that this is true, and then redefine $f$ in a small neighboorhood around a point where $f'$ is not continious such that it is smooth, but I can't proof it, and I can't find mentoin anywhere on the internet, so I'm wondering whether this is actually true.


professor pushing me to get result when nothing is right!

Background  My professor assigned me a project as part of a course.  and has several flaws. I explained the problems of the project to my professor. However, the professor seems to believe that I just don't understand the project and don't know how to code.  The professor now sent the other student on a work trip for seven or eight months, starting in 10 days.  In the meantime, the professor asked me to fix the project and produce the results.  Unfortunately, the project is so flawed that I can't produce results with it. I believe that it's the other student's responsibility to fix the project. S/he also knows the project and it's issues much better than I do.  The professor still doesn't consider my concerns and just pushes me to finish the project. He wants to grade the course based on a publishable paper from this flawed project. (My other classmates already have required information to design a controller, and assigning this flawed project and grading like this is not fair.) Meanwhile, the professor does not even want to talk about a topic for my own thesis. I feel taken advantage of and don't know what to do.  Questions  What can I do to convince the professor that I should no longer waste time on another student's broken project but rather start my own? Would it be okay to refuse to work on this project?


python 2 vs python 3 class with __iter__

I am trying to figure out how to make this class work in Python 3, it works in Python 2. This is from a tutorial by D. Beasley for generators. I am new to Python and just working through tutorials online.   Python 2  class countdown(object):     def __init__(self, start):         self.count = start     def __iter__(self):         return self     def next(self):         if self.count <= 0:             raise StopIteration         r = self.count         self.count -= 1         return r  c = countdown(5)  for i in c:     print i,   Python 3, not working.  class countdown(object):     def __init__(self, start):         self.count = start     def __iter__(self):         return self     def next(self):         if self.count <= 0:             raise StopIteration         r = self.count         self.count -= 1         return r  c = countdown(5)  for i in c:     print(i, end="")


Is anyone can help me, how can i make my website that google in search list will show the URL like this (www.ask.com › All › Apps, Gadgets, Computers & Games)?   Separated by angle brackets, and any part can separately choosen.  Thank You for help!


So this is pretty obvious in what it is asking: To prove that anything between $0$ and infinity are part of the positive reals.  I feel kind of stupid for asking but I just don't even know where to start. The topic this question comes under is countable sets and bijections, not sure if that helps or not.


Just found out pregnant and smoked marijuana

I just found out I am pregnant and I am 11 weeks. I am embarrassed to admit I smoked marijuana (casually, not everyday) until I found out a few days ago. Aside from the health risks for my child, I am hearing that even though it's early on, the child could test positive for THC come time for labor. Is this true? I will not touch the stuff now and won't for the duration of my pregnancy. Is it possible they will find THC and is it mandatory for the baby to be drug tested in Florida?


Why a two wheeler is not pulled down by gravity while moving

As for every two wheeler the centre of mass  will be much closer to earth in leaning position than in standing. but while moving it doesn't fall (lean).what kind of forces are preventing the falling of 2wheeler.


prove the limit of $f(x,y)=\frac{x^3−y^3}{x^2−y^2}$ exists with an $\epsilon - \delta$ prove

Given the function $f(x,y)=\frac{x^3−y^3}{x^2−y^2}$. Defined by $x^2\neq y^2$ and $(x,y) \in \Bbb R$. Proof that $\lim\limits_{(x,y) \rightarrow (0,0)} f(x,y)$ exists.  I found that the limit went to $0$. And I was trieing to prove this with an $\epsilon$ $ \delta$ prove, but I'm stuck.  I got:   Let $\epsilon > 0$ be given, take $\delta= ....$. Than $|(f(x,y)-L|$=$|\frac{x^3-y^3}{x^2-y^2}|$= $|\frac{x(x+y)+y^2}{x+y}|$=$|x+\frac{y^2}{x+y}|$  I don't know how to go on.


I have a program which spawns several child processes.  I want to know which files this program and its children are creating, deleting, and modifying.   inotifywait can tell me which files are being accessed, but cannot tell me which process is doing it. And I have to know where the files are being created in order to set up the monitor. auditctl will let me log which processes modify a file, but, again, I have to know where the files are in order to set up logging. lsof will tell me all of the files, but doesn't seem to be a good solution for real-time tracking.   Is there anything that will let me monitor a program's file manipulation without knowing a priori which files will be manipulated?


What should I write in Terminal to see all main commands?


Is a continuous function $ f\colon(0,\infty)\to R$, such that $f(x)\leq f(nx)$ increasing?

My question is related to:   and   Let $f\colon (0, \infty)\to R$ be  continuous such that  $f(x)\leq f(nx)$ for all positive $x$ and natural $n$.  It was proved that the limit (finite or infinite) in the infinity exists. Do we know if such a function must be (weakly) increasing? I believe that there might be counterexamples.


How I can copy to the clipboard the path (or the full url) of a file or a folder?

It's very annoying to always have to open the Information about... window to get the path of a folder or a file.  Is there something like a contextual menu to get the url or the path of any file or folder?


Other unbiased estimators than the BLUE (OLS solution) for linear models

For a linear model the OLS solution provides the best linear unbiased estimator for the parameters.   Of course we can trade in a bias for lower variance, e.g. ridge regression. But my question is regarding having no bias. Are there any other estimators that are somewhat commonly used, which are unbiased but with a higher variance than the OLS estimated parameters?  If I would have a huge data set I could of course sub-sample it and estimate the parameters with less data, and increase the variance. I assume this could be hypothetically useful.  This is more of a rhetorical question, because when I have read about BLUE estimators, a worse alternative is not provided. I guess that providing worse alternatives could also help people understand the power of BLUE estimators better.


Why can't table markup elements be used?

In , Jeff explains which basic HTML elements are allowed. Near the end he states      We do not and will not allow table tags -- sorry. This is intentional and by design.   I am wondering what the rationale behind the decision is. I could see the difficulty in getting the tr and td elements to properly close for users not familiar with HTML, and perhaps how tables lend themselves to wasting too much horizontal real estate.  I'm not suggesting that tables be allowed in the SO engine, but I would like to know what pitfalls I can expect if I allow my users to enter them in my (soon-to-be-written) application that allows markup.


Not much context to it.  export essential='/Users/mac/Desktop/AP\ Prep/javatest/essentials'  cd "$essential"   Yields this error:   -bash: cd: /Users/mac/Desktop/AP\ Prep/javatest/essentials: No such file or directory   The cd command is correct :   cd /Users/mac/Desktop/AP\ Prep/javatest/essentials works.   It looks fine ...I've tried it with double quotes and no quotes as well. Help please???


Why this method is wrong in finding the limit?

lim as x tends to infinity of Ln(x) is infinity of course. But let's try another way: lim (ln(x)) =lim x(ln(x)/x) = lim(x) × lim ln(x)/x = lim(x) × lim (1/x)(LHR)= lim(x×1/x) =lim(1)=1 so what's wrong?


<apex:page standardController="Employee__c" extensions="testPage" id="p"> <apex:form id="f">        <div>         <input type="radio" name="acc" value="Existing" checked="checked"                 onclick="show(true, false);">Existing</input>         <input type="radio" name="acc" value="NEWAcc"                 onclick="show(false, true);">New</input>     </div>     <apex:pageBlock id="pb1" title="Pg Block 1">     <apex:pageBlockButtons >  <apex:commandButton value="save" action="{!saving}"/>    </apex:pageBlockButtons>     <apex:pageBlockSection columns="1">    <apex:inputField value="{!pme.Name}" />    <apex:inputField value="{!pme.Address__c}"/>       <apex:inputField value="{!pme.Phone__c}"/> <apex:inputField value="{!pme.type__c}"/>     </apex:pageBlockSection>     </apex:pageBlock>     <apex:pageBlock id="pb2" title="Pg Block 2">     <apex:pageBlockButtons >  <apex:commandButton value="save" action="{!saving}"/>   </apex:pageBlockButtons>     <apex:pageBlockSection columns="1">    <apex:inputField value="{!pme.Name}" /> <apex:inputField value="{!pme.Job_Title__c}"/>    <apex:inputField value="{!pme.Salary__c}"/>    <apex:inputField value="{!pme.type__c}"/>     </apex:pageBlockSection>     </apex:pageBlock> </apex:form>    <script> function show(showPb1, showPb2) {     // Match Visualforce's prefixing pattern     document.getElementById('p:f:pb1').style.display = showPb1 ? 'block' : 'none';     document.getElementById('p:f:pb2').style.display = showPb2 ? 'block' : 'none'; } show(true, false); </script> </apex:page>   Controller  public with sharing class testPage { public string Existing{get; set;} public string NEWAcc{get; set;} public Boolean radioexisting{get; set;} public Boolean radionew{get; set;} public Employee__c pmepme{get;set;} List<SelectOption> ownershipValues;     public Employee__c emp{get;set;}     public Employee__c pme{get;set;}     public Employee__c emplist{get;set;}     public String var {get;set;}         public boolean editSection {get;set;}          public testPage(ApexPages.StandardController controller) {         radioexisting=true;         radionew=false;             Employee__c emp=new Employee__c();             pme=(Employee__c )controller.getRecord();             editSection =true;             var= ApexPages.currentPage().getParameters().get('Id');              system.debug('erecrrrtrtrt');                  system.debug('erecrrrtrtrt'+NEWAcc);             if(var!=null){             emplist=[select Name,Address__c,Phone__c,Job_Title__c,Salary__c,type__c  From Employee__c where id=:var];             }             }          public PageReference saving(){                         system.debug('erecrrrtrtrt'+Existing);                  system.debug('erecrrrtrtrt'+NEWAcc);             upsert pme;             PageReference p=new PageReference ('/'+pme.id);             p.setRedirect(true);             return p;             }     public PageReference pbBlockRender() {     return null;     }     public PageReference EdittheSection (){ editSection = true; PageReference pf=new PageReference('https://c.ap2.visual.force.com/apex/test6');  pf.setredirect(true); return pf;           }      public String mypbBlock { get; set; } }   iam getting the following please help to fix it     System.SObjectException: SObject row was retrieved via SOQL without   querying the requested field: Employee__c.Name


I am working with two separate spreadsheets and i have dual monitors. I'm using MS Office 2010.  How can I get one SS to open on the primary monitor and the second SS to display on the secondary monitor?  Thanks!!


Is there a way to ignore an out parameter? I.e.    bool myIntIsValid = int.TryParse(stringValue, void);   or  bool myIntIsValid = int.TryParse(stringValue, out new int());


How to generate "Password" to transfer data?

Old Handheld games like The Legend of Zelda: Oracle of Ages/Seasons, Golden Sun and Golden Sun : The Lost Age have the possibility to share data between games in the form of passwords. I was wondering how such a password is constructed and checked.


Why is the drag force proportional to $v^2$ and defined with a factor of $1/2$?

$$Drag = \frac{1}{2}C_d \rho Av^2$$ I understand that the strength of the drag depends on the density of the fluid the body passes through, the reference area of the body, the , and the velocity of the object. I don't, however, understand the 1/2 and the $v^2$ in the equation.


How do I reconcile this contradiction about an NPC's actions in the Curse of Strahd adventure?

In the description for  on page 230 of the Curse of Strahd adventure, it says      Though van Richten could have done them harm, he instead interrogated Ezmerelda's mother and father on the wereabouts of his missing son. Satisfied with their answers, he spared their lives before departing [...]   However, it says in the "Journal of Rudolph van Richten" handout on page 255 (in ):      When I found the caravan, I threatened to set the zombies on the Vistani unless they returned my dear boy. They replied that he had been sold to the vampire, Baron Metus. Something inside me snapped. I released the zombies, and the entire tribe was eaten alive.   So which of the above is correct:      Did van Richten kill the tribe with zombies? Or did he spare them and walk away?   Obviously Ezmerelda survived, but      I imagine she wouldn't be fond of van Richten if he slaughtered her entire tribe, yet why would he lie? Is it guilt that he didn't kill them so he's covering his tracks? Is it the senile ravings of a old man (though he seems pretty sound of mind to me)? Or is Ezmerelda mistaken, and her family were illusions for several years (that doesn't sound right)?   How is one able to figure this out? Does it say somewhere in the book that the journal lies, or that Ezmerelda is under some sort of enchantment?


Scale of Model in Blender is not same in .stl

I have set the scale to 0.0254, which makes Blender display correct dimensions in inches. But when I export to .stl, the diameter of my circle in the model is 2.75mm instead of 2.75 inches. Also, I am trying to get these models 3D printed, using printing services, and each time I do so, the file scale is wrong and I have gotten several incorrect parts as a result. How do I guarantee that Blender is exporting the dimensions I need them to be?


How do I forward an X11 window as a webpage?

Is there any way to view an X11 window over a network, but as a webpage? I would like to run some applications off of a simple linux server and interact with them through a web browser. Is there any way to do this?


During my education in Iran, until now, which I must say that I'm graduating high school this year and will go to college next year, our biology book has said that there's some bacteria in our colons and those little cells live there and use the celloluse of our food and because mostly they are anaerobic they produce methane or hydrogen and hydrogen sulfide and so on and sometimes they are the reason of the smell of our farts. Also they produce little amounts of B and K vitamins which is good for us and also, by using cellulose they make the rejection of feces better and easier. Anyway I wonder that where do these bacterias come from? I mean are they with us since birth? Then it means they come from our mother's body but, wait how our mothers have them? But maybe they are not there since birth and they come to colon from the food we eat during our life, but why don't they die in stomach. Even if we think that they go there by eating food, passing stomach easily, what if we don't eat the "food that can have those bacteria", then could it be possible to some humans don't have those bacteria? But they can't have a good release of feces.


remove_action or remove_filter with external classes?

In a situation where a plugin has encapsulated its methods within a class and then registered a filter or action against one of those methods, how do you remove the action or the filter if you no longer have access to that class' instance?  For example, suppose you have a plugin that does this:  class MyClass {     function __construct() {        add_action( "plugins_loaded", array( $this, 'my_action' ) );     }      function my_action() {        // do stuff...     } }  new MyClass();   Noting that I now have no way of accessing the instance, how do I unregister the class? This: remove_action( "plugins_loaded", array( MyClass, 'my_action' ) ); doesn't seem to be the right approach - at least, didn't seem to work in my case.


writing a basic script that pings the current network

I'm having trouble writing a simple script that pings its current network.  I want the output to look the same as a normal ping but I'm having trouble getting to that point  here's the original question from the assignment   -write a short script(using the ping command)to do a "ping" scan of your current network.   any help you can give is much appreciated   I originally tried printf but I wasn't able to even get a decent output so I gave up and started using echo   This is what I have right now  #!/bin/bash  for ping in $(ping -c 4 -v 192.168.1.10)   do echo $ping done   my teacher said that I would run into two problems with the simple ping script and that I could find the answer in the ping man pages. however I can't seem to find anything to help.   I basically want the script to run as if I just ran a normal ping command and have it display output in the same way.


text in upper right corner of title page in beamer

I need to add a small text in the title page at the upper right corner. Does anyone know how to do that? I tried to search online, but I couldn't do that.


Logging into hotel Wi-Fi changes bash prompt?

Since clicking on the “I agree” pop-up when logging into a hotel Wi-Fi, my bash prompt contains some kind of hash in it. The format is now:  <strange hash>:<working dir> <username>   What’s going on? Is this dangerous?


Order of items in classes: Fields, Properties, Constructors, Methods

Is there an official C# guideline for the order of items in terms of class structure?  Does it go:   Public Fields Private Fields Properties Constructors Methods ?   I'm curious if there is a hard and fast rule about the order of items? I'm kind of all over the place. I want to stick with a particular standard so I can do it everywhere.  The real problem is my more complex properties end up looking a lot like methods and they feel out of place at the top before the constructor.  Any tips/suggestions?


I can't figure out how to reinstall windows

I wanted to try Ubuntu out, but now that I've tried it I don't really think it is for me and I want to go back to Windows 10.  I can't figure out how though.  I don't know anything about Ubuntu, and I tried using a Windows 10 recovery disk, but Ubuntu seems to just ignore it.  I can't figure out how to get Ubuntu off my computer.  It is really starting to stress me out, I've been googling for hours trying to figure this out, but every answer I find assumes I can do things that I can't even figure out how to do.  The most I've been able to do is get to some boot menu that lets me either boot Ubuntu normally, or do advanced options that just gives me 4 Ubuntu options.  I have access to command thing and something else by typing 'e' or 'c', but I have no idea what to do in either of those to help.  If I had known how difficult it was going to be to go back I'd have never installed Ubuntu in the first place.  I feel like I need someone to walk me through the entire process because I have no idea what I am doing, and google searches never give me answers that help me.


Suppose my teacher gives Me and my friend homework. After completing the homework, my friend comes to my house to be sure if he has done his homework correctly or not. He asks me "have I completed my homework correctly?" It seems to me that there is something wrong with his homework. Can I reply "No, I think you may have/might have made a mistake."  'May' or 'might': Which one is correct in the given context? I think both are correct but "might" expresses less probability. I am not sure.


How can I use an array of function pointers?

How should I use array of function pointers in C?  How can I initialize them?


What is the simplest modern way to sign a packaged executable?

Before this gets marked as duplicate I have found answers at several sources (, , ) however all of them either use makecert.exe, signtool.exe, or fail to mention proper workflow of the New-SelfSignedCertificate command in PowerShell 4.  Could you describe the certificate signing process to an absolute novice?  The process should be free and understandable for someone who has nothing to work with but an executable they made and a domain (in my case purchased from ).  The end goal of this is to remove the "Unknown Publisher" warning from all of my applications that I have made for other people to use. Usually these are packaged by PyInstaller as single-file applications, however I plan to expand this to full installable applications with one main executable in the future.    The file that I will be testing this on is my  that simply finds the iTunes installer from Apple's website, extracts only Bonjour, and runs only the installer for the system architecture.  I should also mention that I am doing this on Windows 10.


After installing Ubuntu server how do I install the desktop environment?


Where can I thank contributors to StackOverflow?

Actually, I would like to thank StackOverflow for providing great Q&A site.  But I don't know where to say thanks or to whom to say thanks.  Let me explain why I would like to thank StackOverflow:   I am a newbie in iPhone development. Whatever I learned about the iPhone through surfing on Google & different forums was not enough to get solution to my queries. StackOverflow is a Q & A site, which has been the best Help for me. I can get all of the solutions of my problems from unknown people. I would like to thank all those people who helped me, because right now even my seniors don't try to help me. Whatever StackOverflow and all of its members are doing for me is like taking help from family members. I found only the site " StackOverflow " managing the information properly. Like No Repeat ( if it is then closed ) Even user gives repeated link as helen just given below my question No abuse words Only Information No invalid discussions like forums - just Straight forward information   I am proud to be a member of StackOverflow. I've learned the most from members of StackOverflow.    But, I don't know how to say thanks to those who helped me! How can I do this?


Is it worth having an "other" reason to close a question?

I was looking through the close votes on Electronics.SE, and saw a lot of unclear and too broad reasons, .  Then a comment said that those particular reasons are used as catch-alls for questions that don't fit any other category, which effectively makes them other instead of their original intents.  In this case, the actual reason was too lazy to google, which would probably do well as its own reason, but that's beside the point of this meta question.  But since there's no way to cover everything with a fixed set of options, would it be inviting abuse to add an explicitly other reason to close, possibly with required comments?  I hope this is applicable to all SE sites, not just the one that it came from.


Which one is correct?     There is an apple and an orange..   or     There are an apple and an orange?"


Why doesn't ICollection implement ICollection?

IEnumerable<T> implements IEnumerable. But ICollection<T> does not implement ICollection.  What was the rationale for this and/or was it just an oversight?


Can not allocate more than 4 bytes in socket program

char* quickrecv(SOCKET* sock) {     int ilen;     char* len = (char*)malloc(4);     recv(*sock, len, 4, 0);     memcpy(&ilen, len, sizeof(ilen));     char* buf = (char*)malloc(ilen);     //no matter what value ilen is, sizeof buf is always 4 when it shouldn't be     recv(*sock, buf, ilen, 0);     return buf; }  Hello everyone!  Bit of a noob question here.  I am creating a simple socket protocol in c++ for fun.  I tried making a receive function for convenience however it is not working.  When I receive the data, it either adds characters to the output to make the output four characters long or it cuts off the output so it is only four characters long.  I did some debugging and apparently my char pointer "buf" is only the size of four bytes.  Even though "ilen" is different every time (I checked with printf), buf ends up only being four bytes of allocated memory. Why is the size of buf only four even though the parameter for malloc is different everytime?  Thank you!


Why won't a series converge if the limit of the sequence is 0?

Just thinking about it in terms of logic, shouldn't the series of a sequence whose limit as $n$ approaches infinity is 0 converge?  I know that the $n$th term test for divergence says that if a series is convergent, then the limit of its sequence is 0 and I also know there are some sequences for which it has been "proven" that their series does not converge even though the sequence converges to 0, but I just don't believe these tests. If we stretch $n$ out to infinity and the terms are approaching 0, then how is it possible for the sum of the terms to "overflow" and diverge if the terms are becoming negligibly small?


What do we call this type of argument passing mul(1)(2)(3) how to solve this and how to solve such scenario in case of n arguments passed like this. I want to understand how this concept works.


How can I force SSMS to forget the recently used logins?  Of course I use "SQL Server Authentication" with Login/Password fields.  (It get's annoying, as everytime I open SSMS it shows the "Connect to Server"-Dialog, with a login preselected that is not valid anymore.)  Didn't find any option, and no info here.  Thank you.


I'm having the following problem on the beamer: The resulting frame does not enumerate the figure, ie, I would like "Figure 1:" to appear instead of "Figure:". I am placing the commands I am using, but if it is placed as \documentclass{article} it enumerates normally. \documentclass{beamer} \usepackage{color} \usepackage[portuguese]{babel} \usepackage[utf8]{inputenc} \usepackage{amssymb,amsmath} %para usar simbolos matematicos \usepackage{amsfonts} \usepackage{amsthm} \usepackage{amscd} \usepackage{beamerthemesplit} \usepackage{graphicx} \usepackage{float} \usepackage{ragged2e} \usepackage{tikz}  \begin{document} \begin{frame} \begin{figure}[!htb] \includegraphics[scale=0.5]{fig0} \caption{Esquematização do problema.} \end{figure}  \end{frame} \end{document}  Thanks for your help.


I bought a fully cooked can Hormel Ham. It is to be refrigerated however I left it in my trunk for 4 hours. It is now in my fridge. Should it be okay???


Is there any way or any script to permit only Google maps in my firewall and not the other Google apps like GMail or accounts.google.com?  The problem is that when I inspect the links, maps.google.com is redirected to google.com/maps and there is a possibility to accidentally allow GMail or other services if I dynamically permit google.com. I am using IPtables as firewall.  Any solution or idea how to solve this problem?


Creating an index of quality from multiple variables to enable rank ordering

I have four numeric variables. All of them are measures of soil quality. Higher the variable, higher the quality. The range for all of them is different:  Var1 from 1 to 10  Var2 from 1000 to 2000  Var3 from 150 to 300  Var4 from 0 to 5  I need to combine four variables into single soil quality score which will successfully rank order.  My idea is very simple. Standardize all four variables, sum them up and whatever you get is the score which should rank-order. Do you see any problem with applying this approach. Is there any other (better) approach that you would recommend?  Thanks  Edit:  Thanks guys. A lot of discussion went into "domain expertise"... Agriculture stuff... Whereas I expected more stats-talk. In terms of technique that I will be using... It will probably be simple z-score summation + logistic regression as an experiment. Because vast majority of samples has poor quality 90% I'm going to combine 3 quality categories into one and basically have binary problem (somequality vs no-quality). I kill two birds with one stone. I increase my sample in terms of event rate and I make a use of experts by getting them to clasify my samples. Expert classified samples will then be used to fit log-reg model to maximize level of concordance / discordance with the experts.... How does that sound to you?


Why does 'diffuse_color' expect four values and not three with Python in 2.8?

I am attempting to create a plane and set the color; the following code throws an error at this line:    bpy.data.materials['RSgreen'].diffuse_color=(0,0,0)   the error is:  ValueError: bpy_struct: item.attr = val: sequences of dimension 0 should contain 4 items, not 3  which makes no sense to me; diffuse_color calls for 3 parameters in the .  bpy.ops.mesh.primitive_plane_add(size=4,enter_editmode=False,location=(-2,-2,0.01)) bpy.context.active_object.name='Plane2' bpy.ops.material.new() bpy.data.materials[1].name='RSgreen' bpy.data.materials['RSgreen'].diffuse_color=(0,0,0) bpy.context.object.data.materials.append(bpy.data.materials['RSgreen'])


Is there some alternative in MYSQL for Postgres VALUES syntax:   select *  from (values('1'), ('2')) as f;


Why is the Title option in the user profile only available on Stack Overflow?

Why is the option to add a "Title" in the user profile available only on Stack Overflow (as seen on the screenshot below) and not available on the other Stack Exchange sites?


I have a Ryzen 1700X (got it on launch), running on my main Linux machine, with other components that are on par with it. During the day when the computer is on and I'm not using it, I like to run BOINC client on it, which maximizes all 16 threads of the Ryzen to 100% without a single one falling back, and it can maintain that for hours. My question is, if I were to run the computer like this, ignoring the electrical bill and the failiure of the PSU (which isn't yet to come, my 1050w 80 gold is running very smoothly), how long can I expect the CPU to run for before significant damage is done to the silicone. I haven't overlocked it, not even to the "AMD guaranteed +400M Hz (OC on Ryzen seems unstable), and its cooled by Corsair Hydro H60, which is acceptable, but I have many fans setup which never let the temperature rise above 56 C when the CPU is at 100%.


PHP preg_match (.*) not matching past line breaks

I have this data in a LONGTEXT column (so the line breaks are retained):  Paragraph one Paragraph two Paragraph three Paragraph four   I'm trying to match paragraph 1 through 3. I'm using this code:  preg_match('/Para(.*)three/', $row['file'], $m);   This returns nothing. If I try to work just within the first line of the paragraph, by matching:  preg_match('/Para(.*)one/', $row['file'], $m);   Then the code works and I get the proper string returned. What am I doing wrong here?


Dear All My teacher gave me a tasks to find a solution for this sentence. He marked that the "I've to" part is wrong. But to be honest I don't know what is the resolution. The original sentence part was that:  Besides that, I’ve to mention; ......


Creating Microsoft external user account using C#

I am trying to create a windows liveID accounts using windows live admin center SDK using a different domain.  My question is, Has anyone tried using this liveId as external user in SharePoint Online site? Thanks Nate


PostgreSQL 12: column proisagg does not exist

I created a PostGIS database using the following images  (i.e. 9.3-2.1, 11.0-2.5 and 12.0 tags), however I'm getting the following errors when I try to open the 'public' schema:      An error has occurred:  11:43:59: Error: ERROR:  column "proisagg" does not exist LINE 9:  WHERE proisagg = FALSE AND pronamespace = 2200::oid HINT:  Perhaps you meant to reference the column "pr.prolang".   An error has occurred:  11:46:24: Error: ERROR:  column rel.relhasoids does not exist LINE 1: ...t_userbyid(rel.relowner) AS relowner, rel.relacl, rel.relhas...   I found possible solutions  and . I tried to ask how should I update the query, but I need at least 50 reputation to comment.  Would anyone know how should I fix this question? Or how should I change the definition of the query on pgAdmin?  Thanks in advance.  System:   PostgreSQL 12.0 (Ubuntu 12.0-2.pgdg16.04+1) pgAdmin III Ubuntu 16.04 LTS


Is there any bidirectional 5v-3.3v level shifter?

Is there any IC that interfaces any 3.3V Input/Output to 5V Output/Input? I need it primarily for an Arduino Due but if there any bidirectional IC that works like that it would be great.  Some people advised me to use the SN74AHC125 and CD4050 ICs, but I don't understand how they work or how to interface with them.


Understanding section of "upstream_version"

When looking at the latest updates published by a  I noticed that there was a recent update to a package despite the minor version not incrementing:  7.0.6-9+donate.sury.org~precise+2  The  says that everything before ~precise+2 is the "upstream_version". +donate.sury.org is clearly the host of the upstream maintainer, 7.0.6 is the software release, but what is the -9 meant to signify?  I would assume it would be the 9th build of that version, but I'm unsure why you would have multiple builds of the same version.  What is it, and is it potentially important to ensure that production servers are kept up to date with it?


Will Upgrading to Mavericks Slow My System?

I have a 2010 iMac and I'm considering upgrading to Mavericks. Will I notice any significant decreases in speed? My specs:


Why does this happen??  $$ y = \sqrt9 \implies y=3$$  $$ y^2 = 9 \implies y=+3,-3 $$  While both equations are in same sense.


Which material should I use for a whiteboard that would erase easily?

I saw some DIY tutorials recommending to use tileboard to make a cheap whiteboard.    I had a piece lying around, and tried some dry-erase markers on it. Turns out they don't erase well at all when dry, and I had to use a window cleaning spray to get it off completely.  Do you know of another cheap material that would allow to more easily clean those dry-erase markers off ?  Edit : I intend to make it large, so the lighter, the better !


A Challenge on linear functional and bounding property

I took a midterm exam and after that wrote this problem down.  My instructor was unable to solve it. The problem is copied here in order for anyone to help me.  Suppose $f:E\to \mathbb{C}$ is a linear functional such that $\exists M \gt 0$ with the following property: $$ \forall x \in E \;\; |f(x)| \le M||x|| $$ Show that $f$ is bounded.


Possible bug with \implies and \Longrightarrow -- there's a dot in the middle of it

I'm using TeXShop 2.43 on Mac OSX 10.6.8 and one of the latest LaTeX releases (I ran an update a few weeks back). My long implication arrows have a dot on either the top or bottom line (see attached photo). It happens with \Longrightarrow, \implies, and \Longleftarrow. The shorter arrows don't have it. It happens with all fonts sizes.  Is this a known issue? I googled it and I looked for it here, but I came up with nothing. Perhaps it's something with my system or version of LaTeX? On TeXShop under Preferences - Typesetting it says the default script is PDFTeX.   I'm sorry if I'm not supplying enough info here, I'm not very behind-the-scenes TeX savvy.


Why Does Amplitude Have no Effect on the Energy of a Light Particle?

In my high school physics class, I was taught that the energy of light is dependent only on the frequency, as demonstrated in the equation $E = h \cdot \nu$.  My question is, why is amplitude part of the equation? As the amplitude of the light increases, it gets more intense, i.e. brighter (ignoring that more light also makes things brighter), so wouldn't it make sense that light that has a greater amplitude also has more energy? And as an extension of that assumption: that lower amplitudes have less energy?  EDIT: not a duplicate, because I'm asking why amplitude is not part of the energy equation, not if a particle has amplitude.


Generalized linear models have become so central to effective statistical data analysis, however, that it is worth the additional effort required to acquire a basic understanding of the subject. I am a starter in Statistics and I really having trouble understanding the GLMs. I mean how GLMs work and why GLMs are required. Can anyone shed some light on GLMs?


My family suggested the process of grilling chicken on a thursday, freezing, traveling 8 hours by car (with meat on ice) on Friday, then reheating to serve on Saturday. Is this safe to consume?


Minimal polynomial of $T_w$ divides the minimal polynomial of T

Let T be a linear operator on a finite dimensional vector space $V$, and suppose that $W$ is a T-invariant subspace of V. Prove that the minimal polynomial of $T_w$ divides the minimal polynomial of T. I tried this: Let $p_1(t)$ be the minimal polynomial of $T$. Let $p_2(t)$ be the minimal polynomial of $T_w$. By the division algorithm for polynomials, there exist polynomials q(t) and r(t) such that $$p_1(t)=p_2(t)q(t)+r(t).$$ where r(t) has degree less than $p_2(t)$. If we choose $w \in W$ $$p_1(T)(w)=p_2(T)(w)q(T)(w)+r(T)(w).$$ then $$r(T)(w)=0$$ This by hypothesis. Hence, $$p_1(t)=p_2(t)q(t).$$ And, $$p_2(t)|p_1(t).$$ Is this correct?


Which statistical tests can I use to analyse significant difference between the means of non-random samples?

I want to compare the means of non-random samples to population mean. However, most standard tests (eg. t-tests, ANOVA, Welch test etc.) are based on the assumption that samples are randomly obtained from the population.  In that case, is there any way to analyse the significant difference between the means of non-random samples?  Thanks.


Pgfplots : can't plot some usual mathematical functions

I'm beginning to learn pgfplots and I would like to plot some functions: cubic root, inverse, and some trigonometric functions.  The problem is that for y=1/x function, it joins up the points between negative and positive parts of the domain: we can't see the asymptote.  \documentclass{minimal} \usepackage{pgfplots} \begin{document} \begin{tikzpicture} \begin{axis}[] \addplot [domain=-10:10, samples=100]{x^(-1)}; \end{axis} \end{tikzpicture} \end{document}   With the function y=x^{1/3}, it doesn't display the negative part of the domain. And with the trigonometric functions, it just doesn't do anything right...  \addplot[domain=-27:27]{x^(1/3)}; \addplot[domain=-2*pi:2*pi]{cos(rad(x))};   thank you very much if you can help me a little bit.    thank you very much for your answers, it's really helping. Just a last thing: the cubic root function has a negative part in its domain that cannot be displayed. Do you know why?  \begin{tikzpicture}  \begin{axis}[     width=8cm,xlabel={$x$},     ylabel={$y$},grid=both, axis x line=middle, axis y line=middle,      title={$f(x)=x^{1/3}$}]  \addplot[blue,domain=-27:27, no markers,samples=100] {x^(1/3)};  \end{axis}  \end{tikzpicture}   NB: Yes, the cubic root function has a partially negative domain, and no, there is no imaginary part. NB: i'm sorry i'm insisting on one of my first questions in this comment which is supposed to be an "answer", i'm just new here and, as i'm not registered yet, i don't know how i can ask something related with the topic in a new "question comment"


When you sign up for a new site, is it supposed to display the favicon/logo of the site in question?

'cause it doesn't - at least not for beta sites. I just signed up for an account on  and got the following:    Rather than using the Blender.SE favicon/logo (), a blank favicon/logo is shown instead. I did get a favicon/logo on the corresponding page when signing up for Sharepoint.SE, so I'm guessing this is some sort of bug on the beta sites.


If $k \in \mathbb N$ and if $\sum_n a_n, \sum_n a_n^2, \dots, \sum_n |a_n|^k$ converges then $\prod_n (1+a_n)$ converges

Suppose that $(a_n)_n$ is a sequence of complex numbers with the property that $\sum_n a_n, \sum_n a_n^2, \dots,\sum_n |a_n|^k$ all converge where $k\in \mathbb N$. I want to show that this implies that the product $\prod_n (1+a_n)$ converges. I read this in a paper without proof so it should be true. Di you know how to prove this?


Definite article – usage of 'the' dependent on context

Which of the three articles (a/an/the) would the blanks in the following sentence take?  It is not unusual for ____ editor to tamper with _____ writer's manuscript.  I think it should be 'an' and 'the' in the first and second blank respectively, but my colleagues think otherwise. Please suggest.


I have Ubuntu 14.04 installed on my Windows 7 PC using wubi. The system does not boot and I'm trying to mount root.disk file in order to restart it from a Ubuntu live USB. But terminal shows me:  mount: Stale file handle   I have no idea what it means, nor how can I solve it. Any idea?  The commands that I used were:  sudo mkdir /media/win7ub sudo mkdir /media/ubuntu1404 sudo mount -t ntfs /dev/sda3 /media/win7ub sudo mount -t ext4 -o loop /media/win7ub/ubuntu/disks.root.disk /media/ubuntu1404   I run WIndows 7 professional and my PC does not support UEFI. I installed WUBI 12.10


how to change string array to array. String[] to ArrayList format conversion

How do I convert String Array to Array List:  String[] to ArrayList<String>


If $R$ is an Euclidean domain that is not a field, is $R[X]$ a PID?

I have a question in ring theory whose answer I am looking for.  Consider R to be a Euclidean Domain such that R is not a field. Then is polynomial ring R[X] is always a PID or not.  Attempt : R is ED implies R[X] is ED and R is ED implies R is PID. But can someone please tell what can I say about R[X] from it.


Relevance of opinion poll (500 people from 10.5 millions)

In local news [1] comes with information that 58% of people is for something. This information is based on option pool that ask 500 people from 10.5 million about that question. What is confidence interval for people that are for that something?  To solve this I try following. The $n$ people from $10^7$ is for something. I randomly select 500 of them and I will try to find $n_1,n_2$ for which:  $$     n_1: \frac{\binom{n_1}{290}\binom{10^7-n_1}{210}}{\binom{10^7}{500}}<0.05 $$  $$     n_2: \frac{\binom{n_2}{290}\binom{10^7-n_2}{210}}{\binom{10^7}{500}}>0.95 $$  But this is not easy to solve. So I am looking for some solvable algorithm.  [1]


Messaging.SingleEmailMessage attachment size limit? 3, 5, 25?

I have been reading and I have found so many different answers that are not consistent, for the question of what is the maximum attachment size in Apex when using Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage(); Messaging.EmailFileAttachment efa = new Messaging.EmailFileAttachment(); efa.setFileName('myfilename.json'); efa.setBody(Blob.valueOf(blabla)); mail.setFileAttachments(new Messaging.EmailFileattachment[]{efa}); .....  what is the actual max limit of the attachment (efa)? 3mb? 5mb? 25mb?


How to tell the order of a Feynman diagram?

How can we know the order of a Feynman diagram just from the pictorial representation?  Is it the number of vertices divided by 2?  For example, I know that electnro-positron annihilaiton is first order:   So what's the order of, for instance, a radiative penguin diagram (below) ?


Is there a rules-based way to make a dragon player character?

I got to thinking Wouldn't it be cool to play some kind of proper dragon with Character levels?  So I wonder, is there a rules-based way to make a dragon player character?  My guess is that this is one of those DM fiat sort of things, and that it could be unbalanced. But is there any way?


How to remove the "possible duplicate" banner? (before the question is actually closed)

How could you change a post that is marked as "possible duplicate" (only OP can see the banner) after receiving dupe flags or close votes, but was changed to make it not a duplicate? Can it be changed from a duplicate to not a duplicate by the asker?  The question at   is similar but is not the same. I am asking how to remove the "duplicate" flag, and unless I missed something the answers in the link above do not specify how.


Prove by induction that $\sqrt[n+1]{n+1}<\sqrt[n]{n}$ for $n\ge 3$

I've been dealing with this problem for almost 2 hours now, with hardly any progress. I'm to prove the following inequality using induction   $$\sqrt[n+1]{n+1}<\sqrt[n]{n}$$ where $n≥3$, $n∈\mathbb{N}$. How can this be done?


Rule on changing a question after a bounty was raised

What is the rule on completely changing a question once a bounty has been raised ?  For instance:  is a question for which a bounty was raised and I answered it.  Now the question is  to a completely different question and the answer is completely out of context. Now in a scenario with multiple answers/ and or very few days to award the bounty - if the question is changed then the thread becomes pretty irrelevant and the bounty pretty much becomes useless. Is this by design or is there a peer review for bounty question edits?


TeXstudio - how to get access to the "added words" to dictionary?

By mistake, I have added a wrong word to the dictionary of TeXstudio. Now I cann't find where it is added. I have also tried to find the .ign file, but couldn't find such file in any folder. Please help how to get access to the words added to the dictionary of the TeXstudio. I have using Windows7 and TeXstudio 2.10.8.


How to install it in unallocated space? I have created a 100 GB space for Ubuntu. I need to install it along with Windows 10.


Should I accept technically correct answer or the answer which is the solution for me?

I asked the following question.    It got two answers.  Answer 01 :  Answer 02 :  Answer 02 is the technical answer and it is correct for my question.   Answer 01 is not a technical answer and he suggest a alternative way to solve my problem. But that is the most practical answer for me (Again I repeat it is for me). So accepted it. But I feel like it is unfair because Answer 01 is technically correct answer. Should I accept answer 01 or 02?


Public key encryption algorithm for short messages

I need to encrypt a high number of short messages (30-200 bytes). The problem with usual algorithms, such as RSA, is that the size of the encrypted message tends to increase a lot, compared to symmetric encryption algorithms.  Ideally, this cryptosystem shoud accomplish:   Asymmetric Size of the encrypted message must be at most 25% longer than the original Should be fast encryption and decryption It's not a problem if, after some work, some messages are decrypted But private key must not be found so easily It would ve good if it's a known algorithm with solid implementations in most common languages   The only solution I found until now is using RSA with short keys (64 bits), but I wonder what a better approach could be.


For a group $G$, show the relation $x\sim y$ defined by $\exists a(y=axa^{-1})$ is an equivalence relation on $G$.

Let G be a group. For $x,y\in G$, define $x\sim y$ if there exists some element $a\in G$ such that $y=axa^{-1}$. Show that ~ defines an equivalence relation on $G$.


How to understand the notion of a differential of a function

In elementary calculus (and often in courses beyond) we are taught that a differential of a function, $df$ quantifies an infinitesimal change in that function. However, the notion of an infinitesimal is not well-defined and is nonsensical (I mean, one cannot define it in terms of a limit, and it seems nonsensical to have a number that is smaller than any other real number - this simply doesn't exist in standard analysis). Clearly the definition $$df=\lim_{\Delta x\rightarrow 0}\Delta f =f'(x)dx$$ makes no sense, since, in the case where $f(x)=x$ we have that $$ dx=\lim_{\Delta x\rightarrow 0}\Delta x =0.$$  All of this leaves me confused on how to interpret expressions such as $$df=f'(x)dx$$ Should it be seen simply as a definition, quantifying the first-order (linear) change in a function about a point $x$? i.e. a new function that is dependent both on $x$ and a finite change in $x$, $\Delta x$, $$df(x,\Delta x):=f'(x)\Delta x$$ then one can interpret $dx$ as $$dx:=dx(x,\Delta x)= \Delta x$$ such that $$\Delta f=f'(x)dx+\varepsilon =df +\varepsilon$$ (in which $\varepsilon$ quantifies the error between this linear change in $f$ and the actual change in $f$, with $\lim_{\Delta x\rightarrow 0}\varepsilon =0$).  I feel that there must be some sort of rigorous treatment of the notion of differentials since these kind of manipulations are used all the time, at least in physics?!  I've had some exposure to differential geometry in which one has differential forms, in particular $1-$forms which suggestively notationally "look like" differentials, for example $$\omega =df$$ but as I understand it these are defined as linear maps, members of a dual space to some vector space, $V$, which act on elements of $V$, mapping them to real numbers. Furthermore, the basis $1-$forms are suggestively written as what in elementary calculus one would interpret as an infinitesimal change in x, $dx$. But again, this is simply symbolic notation, since the basis $1-$forms simply span the dual space and are themselves linear maps which act on elements of $V$.  I've heard people say that differential forms make the notion of a differential of a function mathematically rigorous, however, in my mind I can't seem to reconcile how this is the case, since at best they specify the direction in which the differential change in a function occurs, via $$df(v)=v(f)$$ (since $v(f)$ is the directional derivative of a function $f$ along the vector $v$).  If someone could enlighten me on this subject I'd really appreciate it.


Jordan Normal Form and Minimal Polynomial

Write down all possible Jordan normal forms for matrices with characteristic polynomial$ (x − λ)^5$.   In each case, calculate the minimal polynomial and the geometric multiplicity of the eigenvalue λ.   For the only eigenvalue $\lambda$, the possible JNF is just assigned 1 to every column above the diagonal since the min polynomial can be any degree from 1 to 5?  I figured out the possible JNF using the possible minimal polynomial   $(x-\lambda)$and $(x-\lambda)^2$ and $(x-\lambda)^3$...$(x-\lambda)^5$ In total, it is 7 possibility (corresponding to each minimal polynomial and $\lambda$ has to appear 5 times.) But I don't understand that why the number of blocks gives the geometric multiplicity since each represent one eigenspace.  Thank you so much!


Need help understanding this tricky LCM problem.

[Moderators please note this is NOT a duplicate of    These posts only answer how 36 is the lowest value memeber of S, but not HOW and WHY '36  is the lowest member of S' means 'all the integer multiples of 36 are also members of S'. ] Here is a tricky math problem. I could understand half of its solution. But need help understanding the last bit.  Let S be the set of all positive integers n such that n^2 is a multiple >of both 24 and 108. Which of the following integers are divisors of >every integer n in S?   a)12 b)24 c)36 d)72  Solution: Since n^2 is said to be multiple of 24 and 108 it implies that n2 is also multiple of LCM of 24 and 108. The LCM of 24 and 108 is (2^3)(3^3). But this doesn't mean that every multiple of (2^3)(3^3) will be a member of {n^2}, and also since (2^3)(3^3) is not a perfect square its also not a member of {n^2}. The smallest member of {n^2} will be (2^3)(3^3)(6) i.e. (2^4)(3^4) and so the first member of set S is squrt((2^4)(3^4)) = (2^2)(3^2) = 36. I have understood how to find the first member of set S and this in itself is enough to get the solution as (c) and (d). The solution goes on the state that  Other members of {n^2} are all the positive integer multiples of (2^4) (3^4) and so the other members of set S are positive integer >multiples of 36.  I am not able to understand how it was concluded that the rest of the members of {n^2} are all the integer multiples of (2^4)(3^4) and no other (other than multiples of (2^4)(3^4)) numbers. Can anyone explain how just because (2^4)(3^4) is a member of {n^2} means all its multiples are also members of {n^2}? Thank you. NOTE: I get how 36 is the lowest member of S, as has be answered in other questions...what I am not able to understand is how does 36 being the lowest member of S means all its integer multiples are also part of S. Also, how is it that only the multiples of 36 are members of S? Solution from book:


How can I get LuaLaTeX to turn three hyphens into an em-dash?

For some reason, LuaLaTeX is outputting an en-dash for both -- and --- for me.  MWE:  test.tex:  \documentclass{article}                                                \begin{document} blah-blah  blah--blah  blah---blah \end{document}   lualatex test produces:    pdflatex test produces:


this is my code and when I run this example it gives NullPointerException could you help me please to find the error or why I've got this exception ! my code :  public class Frame extends JFrame {     public Frame()     {         JLabel label;         label.setText("test");         add(label);         setSize(200,200);         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);      }     public static void main(String[] args)      {         new Frame().setVisible(true);     } }


I live in the Northeastern part of the US. We've had a lot of snow recently. Part of living in a snowy area is clearing the collected snow pack from the wheel well so that it doesn't interfere with driving. The snow is usually filthy and ice-coated from where the tires have kicked crud up from the road surface.  We call these snow goblins and most people make it a habit to kick off the snow goblins before setting out in the car.  It's a common expression around here, but I'm wondering how far it extends regionally. Do most snow-experiencing regions in the US and Canada have snow goblins? Or are they called something else?  And I'm not asking what snow goblins are called, because they are called snow goblins, so the "duplicate" doesn't have an answer for me.


If two parallel lines meet at infinity, then what is their angle?

Since lines that meet at some point have an angle. And if parallel lines meet at infinity, then that what is the angle of two parallel lines that meet at infinity?


What is the correct name for a “product function” on a monoid?

Let $W$ be a monoid. A function $f\colon W\rightarrow W$ is a "product function" if $f(w)$ is a product of constants in $W$ and positive integer powers of $w$. It could also be called a "non-commutative arithmetic sequence". I'd like to use the correct name to refer to these functions as well as the related monoid of "formal product functions in an unknown variable", isomorphic to $W * \langle x \rangle$, the free product of W and the free monoid in a single generator, $\langle x\rangle = \{1,x,x^2,x^3,\ldots\}$. These have the same relation as polynomial functions in a ring $R$ to formal polynomials with coefficients in $R$.


It has been suggested by my employer that i should get the Hepatitis B vaccine to protect myself.  I have had two of the three parts, but this is the first time i have had a vaccine in more than one session.  The vaccine is in 3 doses, each around a month apart, followed up by a blood test.  Why is the Hepatitis B vaccine split into 3, any what is the blood test for at the end?


Where can I ask questions related to RDF, LDP, REST etc.?

I have posted the question in superuser.com, but not sure if it is the right place. Can this question be redirected to proper community:


Strange side-effect in beamer: Text in columns in titlelike color after \maketitle

There seems to be a strange side-effect in \maketitle in beamer; see the following MWE:  \documentclass[12pt]{beamer} \usetheme{madrid} \setbeamercolor{titlelike}{fg=orange}  \usepackage[american]{babel} \usepackage[utf8]{inputenx} \usepackage[T1]{fontenc} \usepackage{lmodern}  \title{List of Donald Duck universe characters} \author{Walt Disney}  \begin{document}  \frame{\maketitle}  \begin{frame}{Testslide} Text before the columns in black \begin{columns}[t] \begin{column}{0.62\textwidth} Some text in \texttt{titlelike} color \end{column}  \begin{column}{0.38\textwidth} Some more text in black \end{column} \end{columns} \end{frame}  \end{document}   Only the text in the first of both columns has the same color as the title. It also happens without the \setbeamercolor{titlelike}{fg=orange} statement, but who sees white text on a white background? It does not happen if \maketitle is not invoked. \titlepage instead of \maketitle has the same effect.  Any work-around for this?


SSL version of site served by Main Server instead of virtual host (Apache 2.2.15)

I have multiple virtual hosts on port 80 and 443. They all work. The problem comes when addressing the web server by a name not mentioned as a vhost.  The documentation says:     If the lookup fails (the IP address wasn't found) the request is   served from the default vhost if there is such a vhost for the port   to which the client sent the request. If there is no matching   default vhost the request is served from the main_server.   But in my case content is server from the main_server instead of the default vhost. I have tried using both _default_ and * for this default vh  I have  NameVirtualHost *:80 NameVirtualHost *:443   And directives like:  <VirtualHost *:80>         ServerName example.com         ServerAlias www.example.com   and   <VirtualHost *:443>         ServerName example.com         ServerAlias www.example.com   Running apachectl -S Shows my carefully named default vhost.  wildcard NameVirtualHosts and _default_ servers: *:443                  is a NameVirtualHost      default server 00default.example.com (/etc/httpd/sites.d/00default.example.com:29)      port 443 namevhost 00default.example.com (/etc/httpd/sites.d/00default.example.com:29)          alias www.00default.example.com      port 443 namevhost example.com (/etc/httpd/sites.d/example.com:29)          alias www.example.com  ...  *:80                   is a NameVirtualHost      default server 00default.example.com (/etc/httpd/sites.d/00default.example.com:1)      port 80 namevhost 00default.example.com (/etc/httpd/sites.d/00default.example.com:1)          alias www.00default.example.com      port 80 namevhost example.com (/etc/httpd/sites.d/example.com:1)         alias www.example.com   If I visit  http://www.example.com/phpinfo/   It works fine. But  https://www.example.com/phpinfo/   Fails. This is because Apache attempts to serve this request from the document root configured for the main server in the default conf file. "Main server" is defined here:   www.example.com is the actual hostname of the server and  https://www/phpinfo/   or  https://ip.address/phpinfo/   Both work.  It's my understanding that a wildcard default vhost overrides the main server config as it is doing in the case of the HTTP version. Why does it not work for the HTTPS version?  Sample Vhost config:  <VirtualHost *:443>     ServerName example.com     ServerAlias www.example.com     ServerAdmin webmaster@localhost     DocumentRoot /var/www/example.com     #ErrorLog logs/example.com/error_log     #TransferLog logs/example.com/access_log     SSLEngine on     SSLCertificateFile /etc/httpd/certs.d/example.com.crt     SSLCertificateKeyFile /etc/httpd/certs.d/example.com.key     SSLCertificateChainFile /etc/httpd/certs.d/example.com.chain     <Directory />             Options FollowSymLinks             AllowOverride None     </Directory>     <Directory /var/www/example.com/>             AddType application/x-httpd-php .php     </Directory>     <Directory /var/www/example.com/>             Options Indexes FollowSymLinks MultiViews             AllowOverride All             Order allow,deny             allow from all     </Directory> </VirtualHost>   There is also a section preceding the one above, for port 80, that is identical except for the port and the absence of the lines starting "SSL".


Prove that every bilinear map can be written as a sum of bilinear symmetric map and a bilinear anti-symmetric map.

Show that every bilinear map $\phi: E \times E \longrightarrow F$ can be written uniquely as a sum of a bilinear symmetric map ($f(u,v) = f(v,u)$, for all $u,v \in E$) and a bilinear anti-symmetric map ($f(u,v) = -f(v,u)$, for all $u,v \in E$).  My attempt:  I defined $$L_2(E,F) := \{ \phi: E \times E \longrightarrow F \ ; \ \phi \ is \ bilinear \},$$  $$W_1 := \{f \in L_2(E,F) \ ; \ f \ is \ a \ bilinear \ symmetric \ map \},$$ $$W_2 := \{g \in L_2(E,F) \ ; \ g \ is \ a \ bilinear \ anti-symmetric \ map \}$$  and I thought to proof that $L_2(E,F) = W_1 \ \oplus \ W_2$. I got to prove that $W_1 \ \bigcap \ W_2 = \{ 0 \}$, but I dind't get prove that $L_2(E,F) = W_1 + W_2$. How can I show this? I tried to prove by contradiction unsuccessfully.  Thanks in advance!


I'm unable to toggle between Chrome Tabs

Earlier I used to toggle between tabs by swiping left or right and clicking on the tab I wanted to open. But know if I click on the change tabs icon, I can only see the list like this attached image. How to get back to toggling tabs?


I have a small file hosting website that I am trying to store the files that users upload in a database. The issue that I am having is that I cannot decide which method would be better:   To store all users in one table  create a new table for each user.    I understand that the second method will slow performance but by how much? I am planning on having 1000+ users eventually. The issue with the first method is listing the files back to the user. What method should I go with and which one would be the most efficient?


Thinning LiDAR points to remove redundant neighbors?

I'm trying to develop a workflow in ArcGIS with 3D Analyst or Spatial Analyst to intelligently thin a grid of spot elevation points created from a LiDAR DEM. The current point spacing is 1 meter. Some CAD software packages have tools to do this kind of thinning directly on a TIN surface, but I would like to port that functionality into ArcGIS. I'm guessing the workflow would involve some kind of nearest neighbor analysis.  What I would like to do is intelligently thin a grid of points to remove points in areas of redundant elevations. For example, a large parking lot may contain 200 points whose elevations are all within 0.25' of each other. This parking lot's elevations could instead be accurately represented in the surface with maybe 10 points.  The workflow would aim to eliminate neighboring points with similar elevations to reduce the overall number of points in the spot elevation grid. User controls would decide what the height and distance thresholds are to determine whether to remove points. Following the thinning, these spot elevations would get fed into a TIN.


plural of acronym package not working well

I have: \usepackage[printonlyused]{acronym}  on my preamble. Then I defined my acronym, as follows: \acro{BP}{Business Process}  But, when I used it on my text I get: Business Processs (BPs)  Does anyone know how I can correct this problem?


What happend to SMART data (disk selftest option)

My question is; What happened to SMART data selftest option in Disks/gnome-disk-utility   Any help or tips appreciated.(I want to scan/repair my drive for bad sectors preferably GUI)  here is an image of what I am looking for:   I was told this is a duplicate question. However I was totally lost looking for the "gear icon" This is how mine looks in Kubuntu   It might sound silly but I did not make the connection with that "hamburger" being the "gear icon"


How can I evaulate the following series?  $$\sum_{k=1}^{n} 2^{k}k$$  I don't know where to begin. $2^k$ alone would be straight forward.


For a certain dataset, I am finding the k closest points in my dataset to the centroid of the dataset. Are these k points the k medoids or are medoids something completely different. If so, is there any mathematical term for the points that I'm finding? I use 2 distance metrics, one is the Mahalanobis distance and the other is a weighted average of Euclidean and cosine distances.


Existence of $f'\in F$ such that $f^{[G:F]}=(f')^n$ for finite extension $F\subset G$

Let $F$ be a field and $u\in F$. Further, let $F\subset G$ be a finite extension and $v\in G$ such that $v^n=u$ for $n>0$.     How would I show that there exists a $\tilde{u}\in F$ such that $u^{[G:F]}=(\tilde{u})^n$?   My first thought was to use the norm map $N_{G/F}(x)=\Pi_{\sigma\in X(G/F)}\sigma(x)$, where $X(G/F)$ is the fundamental set for $F\subset G$. However, I wouldn't know how to continue on this path.


On October 31st, I earned the Epic badge on SO (woohoo!).  This badge is awarded for getting >=200 daily points score 50 times.  However, if I go to the raw reputation report page† the summary at the bottom tells me that I've only earned >=200 points 49 times.  days represented 1088 rep cap was reached via rep from upvotes *only* on 22 days earned at least 200 reputation on 49 days earned 6 reputation from suggested edits   I understand that these things aren't always in sync or up-to-date, but I thought this raw rep page should be correct. It does show my latest points, so it's clearly got all the data; it just seems to be the summary figures that are off.  I've exceeded 200 points a further 4 times since getting the badge as well, so I don't think it's just an off-by-one counting error either.  Is this a bug, or is it counting different to what the Epic badge counts? Or maybe I really have only done it 49 times, and the badge was awarded prematurely?  I've tried doing a recalc, but that didn't change the stats.  † link is , although don't bother clicking as you'll see your rep report not mine.


Formula for calculating the total number of solution pairs to an equation

I was solving a mathematical olympiad problem, which reads as follows:     How many positive integer solution pair $(x, y)$ are there for the   equation $y^2=\frac{x^5-1}{x-1}$, where $x\ne1$?   My first act was to simplify the equation to this:  $$y^2=x^4+x^3+x^2+x+1$$  Seeing that this did no good, I hit on the idea that this problem was actually very simple. A good, little trick would do it.  I decided to work with the first five integers (excluding $1$, of course). By trial and error, I discovered that there was only one integer solution pair i.e. $(3, 11)$ that satisfies the equation. This was as I suspected before. I also build a C program to confirm this; I was right.   But...     if I were to solve another such problem that doesn't involve tricks, then what? There should be a formula for calculating total number of solution pairs to equations of that kind. Is there? Could I solve this very problem using a formula?   Please answer bearing in mind that I'm only 12 years and a 7th grader.    How my question isn't a duplicate of any other question?  At first look, my question might seem to be the exact duplicate of this: . However, it isn't.   First of all, it's obvious that I didn't notice that question before posting this question.   The main difference lies in the question content and purpose. The other question was solely based on how to solve this particular problem. But, my question isn't that. I have solved the problem. My question is:     is there a formula in general to find out the number of rational solutions of a diophantine equation?   My question has a much more wider purpose. These reasons should be enough to convince you that this question isn't a duplicate of the question at all.


I have this code below.  it creates an image on the left and a description with a button on the right.  the two divs are side-by-side.  I can't figure out how to get the image to be vertically aligned within the surrounding "promo_box_wrapper".

Retirement Living

         Retirement living is designed for senior adults who wish to maintain their independent lifestyles.
                     Learn More

   the site is here:    I've tried adding vertical-align:middle; to these divs:  .promo_box_wrapper, .photo_wrapper, .desc_wrapper, .photo_wrapper img { vertical-align: middle; }   But it's laughing at me.  What am I missing?


In the MCU when we see the Kree they have blue skin and blue blood, such as Yon Rogg's team and Ronan the Accuser.   However when we see Yon Rogg and Mar Vell they don't have blue skin but rather more human colored skin and while this is the same with Carol she was actually human and only has blue blood because it was Yon Rogg's blood infused into her.  So what species is Mar Vell and Yon Rogg? if they are Kree is there a reason why they don't have blue skin like most all other Kree?


I made a house in blender v.2.77 and I textured the windows with a glossy and glass shader. After I rendered the image there were white pixels on the windows. My samples are on 200. How can I get these pixels away ? (sry,I could not add any pictures)


Sell your home and invest in growth stock mutual fund

I purchased a home and I made an agreement with a guy who is living in that home and paying me monthly rent. Since I live with my brother I don't have to live in my purchased home.  The rent I'm getting is only 10% of total cost of home while stock fund industry (mutual fund) is paying 20% minimum i.e. I'm getting 10% loss every year and that is a big amount.  I'm not really sure if my home also increase it's value by 10% every year. But I don't think it will be.  Now I'm thinking of selling that home and investing all of my money in a growth mutual fund. Any advice?


how to write a wrapper class to show the selected account in pdf

I have a table that shows 10 record and whenever i click on 'create PDF' button..whole page is rendered as PDF..But i have a requirement that if i select lets say any 5 record from the table using the check box..then only that records should appear in the pdf  my vf page:  <apex:page controller="queryaccountrecords"  > <apex:panelGrid columns="2"> <apex:form > <apex:pageBlock title="Account_Records"> <apex:repeat value="{!accts}" var="dbItem"> <apex:inputCheckbox id="ankita"/> <apex:outputField value="{!dbItem.Name}" />
 </apex:repeat> </apex:pageBlock> <apex:commandButton value="Create PDF" action="{!createpdf}"/> </apex:form> </apex:panelGrid> </apex:page>   my controller:  public class queryaccountrecords {     public Account[] accts{get;set;}     public queryaccountrecords()      {         accts= [SELECT Name FROM Account LIMIT 10];     }      public pagereference createpdf()     {     pagereference redirect = new PageReference('/apex/generatepdf');     redirect.setRedirect(true);     return redirect; }     }   page that is rendered as pdf:  <apex:page controller="queryaccountrecords" renderAs="pdf" showHeader="false" sidebar="false"> <apex:panelGrid columns="2"> <apex:form >  <apex:pageBlock title="Account_Records">  <apex:repeat value="{!accts}" var="dbItem"> <apex:outputField value="{!dbItem.Name}" />
 </apex:repeat> <apex:commandButton value="Create Pdf" action="{!createpdf}"/>  </apex:pageBlock> </apex:form> </apex:panelGrid> </apex:page>


I have windows 7 and task mgr shows about 20 conhost.exe's running???????


my_array = annotationIm[:,:,1]  the annotation is an image with an annotation mask of size r x c x 3, Layer 1 is the image annotation of both fat and meat of a salami, layer 2 is just the fat, and layer 3 is the meat. the pixel value is 1 in the annotation and 0 elsewhere.


Connecting Android 4 (Ice Cream Sandwich / Jelly Bean / KitKat) phone

I'm using the US Model 16GB version of the Samsung Galaxy S3 (I747), however, I cannot mount it to my laptop from some reason. I have tried using both FTP and MTP connections, but neither work.  What should I do?


If things never travel in straight paths, was the measurement of speed of light 'accurate'?

In quantum mechanics, it seems that nothing has exact positions, and in the pilot wave theory, things tend to travel like this?:   (Credit: Looking Glass Universe)   and in other interpretations, it seems that there can be infinite many travel paths between measurements?  Did the measurements of speed of light take into account that things don't travel in straight paths?


The is keyword in python is described like that: is is used in Python for testing object identity. While the == operator is used to test if two variables are equal or not, is is used to test if the two variables refer to the same object. It returns True if the objects are identical and False if not. >>> True is True True >>> False is False True >>> None is None True  We know that there is only one instance of True, False and None in Python, so they are identical. >>> [] == [] True >>> [] is [] False >>> {} == {} True >>> {} is {} False  An empty list or dictionary is equal to another empty one. But they are not identical objects as they are located separately in memory. This is because list and dictionary are mutable (value can be changed). >>> '' == '' True >>> '' is '' True >>> () == () True >>> () is () True  Unlike list and dictionary, string and tuple are immutable (value cannot be altered once defined). Hence, two equal string or tuple are identical as well. They refer to the same memory location. Till now there is no problem. My issue is that I have two instances of two variables as string type a = 'yasser' b = 'yasser' a is b  This code returns True while a = 'yasser!' b = 'yasser!' a is b  This returns False althought these are of string types. Any explanation..?


Is "below ask" a valid combination of words?

Is "below ask", correct with regards to information given below(suppose info exists below)?


php unique values from multi-dimensional array

I am strugglin' with following array to retreive the unique values. This array comes from a nested product assembly structure. Tried several techniques but no result yet. Maybe someone can help me with this? Thanks in advance!   Array (     [0] => Array         (             [product_ID] => 1             [amount] => 2.00         )  [1] => Array     (         [product_ID] => 1         [amount] => 2.00     )  [2] => Array     (         [product_ID] => 1         [amount] => 2.00     )  [3] => Array     (         [product_ID] => 5         [amount] => 6.00     )   )  Goal is to retreive an array like:   Array (     [0] => Array         (             [product_ID] => 1             [amount] => 2.00         )  [1] => Array     (         [product_ID] => 5         [amount] => 6.00     )   )


Run adduser interactively with a script password problem

I am able to run the adduser command with a script automaticly, but I have no idea how I can get the script to automaticly enter the password hello without needing to type it. Do you have any ideas? The idea of my script is being able to create a new user without interaction with the standard password "hello".


Chat flags . This FAQ might be useful to help avoid drama by educating those who handle chat flags.   As a 10k chat user/chat moderator, I see a small blue circle in chat.    What does it mean?  How should I handle it? As a diamond moderator, how does this change?


How to disable dark theme on webpages in Firefox?

I switched to a dark theme (Dolorean Dark). I like it and I think--it is better for eyes. However I have problems in some web pages. Most pages are intended to be shown on white background. On dark theme form controls have black background and mostly the font is also black, so the content of forms are invisible. I would like to use white theme on web pages in Firefox.


I cant wrap my head around simplifying the following sum:     $$\sum_{k=0}^n \binom{n}{k}x^k(1-x)^{n-k}k,$$   where $0<x<1$.    I tried to apply standard formulas .


What happens to light in a perfect reflective sphere?

Let's say you have the ability to shine some light into a perfectly round sphere and the sphere's interior surface was perfectly smooth and reflective and there was no way for the light to escape.  If you could observe the inside of the sphere, what would you observe? A glow? And would temperature affect the outcome?  Seems silly, it's just something I've always thought about but never spent enough time (until now) to actually find an answer.


started displaying weird text. Is it the case with me only? I'm not sure whether this is the right place to put this question; but I was completely baffled by seeing that. I guess this chat room is hacked. I went on to take the screen shot and the messages disappeared. I'm sure some of the chatrooms have been compromised. If this is not the place please let me know where I could put my query. My mind is not working right now. I'm sorry for this weird post.


Disabling SSL 3 on 64bit Chrome for Windows

I see lots of different places with the same response for disabling SSL3 on chrome (adding --ssl-version-min=tls1 to the end of the execution of chrome.exe). But apparently this isn't working for my 64bit version of Chrome (version 40.0.2188.2 dev-m (64-bit)). Anyone have any ideas?  Also note that this is working just fine on 32 bit version on other systems.


Does every finite nilpotent group occur as a Frattini subgroup?

The Frattini subgroup of a finite group is the intersection of its maximal subgroups.  It is well-known that the Frattini subgroup of a finite group is nilpotent.  My question is whether a kind of converse is true:  Does every finite nilpotent group occur (up to isomorphism, of course) as the Frattini subgroup of some finite group?  The problem reduces immediately to the case of non-abelian groups of prime power order, since the Frattini subgroup of a direct product of finite groups is the direct product of the Frattini subgroups of the factors, and it is not hard to show that any finite abelian group is the Frattini subgroup of a finite (abelian) group.  I had hoped this might kick off an induction, but I've not been able to do anything with it. The first interesting case seems to be the non-abelian groups of order eight.  A computer search of groups up to order $2000$ (not including groups whose order is a multiple of $512$, however, which could not complete on  hardware available to me), turned up nothing for these two groups.  I am not certain what I would expect the answer to this question to be!


How can I undo a default browser selection in Windows 10?

I utilize Chrome and IE as browsers at work and enjoyed being able to select between them.  I recently set a default browser and would like to undo this setting.