A symbol in LaTeX
How to stack three relations
In Ubuntu, I want to open a PDF document generated for Adobe Reader 10. Apparently the latest version which I can install is Adobe Reader 9.5.5. Is there a way to install version 10?  I installed Wine, but I don't know how to install acroread using Wine. Indefinite Integral of $\sqrt{\sin x}$ $$\int \sqrt{\sin x} ~dx.$$  Does there exist a simple antiderivative of $\sqrt{\sin x}$? How do I integrate it? What will be total number of solutions of $a+b+c = n$? Please tell me how to find the total number of intergral solutions of $$ a+b+c=n $$ I already know that total number of solutions will be $(n+3-1)c(3-1)$.  But what will be the case when a varies from let $2$ to $6$ , $b$ varies from $2$ to $6$, $c$ varies from $2$ to $6$.There can be other conditions also. Please give the generalized result. It will be really helpful. Neopronouns or trolling? It’s the  question: Am I looking at someone’s legitimate pronouns or trolling?   (It’s unfortunate I have to ask, but this is just where we are right now.)  I’ve seen “my pronouns are [insert ridiculous fake stuff here]” trolling recently (in posts) when before I never did. Also stuff that looks to be trolling, but could also maybe not be. Trolls deserve red flags while everyone else specifying pronouns does not, right?  (To clarify, the problem is not just about not wanting to use a troll's words. The purpose of some of this trolling is to try and convince people that transgender people—or their neopronouns—are stupid or unreasonable. Ignoring the trolls allows us to avoid the first problem, but not the second since it allows them to still reach people with their message, which is not something that I want to see promoted.)  Some neopronouns are clearly legitimate. Some trolling is clearly trolling. But unfortunately there’s a big grey area where it’s not clear to me what is what.   Does anyone have a good method for dealing with this? There just doesn’t even seem to be a good way to ask about someone’s specified pronouns in such a way that doesn’t sound insulting if the user isn’t trolling.     Note: A while ago, I did some research on neo-/third person pronouns which can be found . There are several important things I found:   There are more neopronouns than I could ever hope to keep track of The most popular neopronouns are very uncommon. On the other end of the spectrum, it looks like some neopronouns are neologisms used by a single person  Some neopronouns come from unlikely places, such as SciFi Take most recent (or concatenate) edit comments when editing during grace period Cancelled cut and paste, what happens? How do I extract a single chunk of bytes from within a file? How do I get the UI thread's Dispatcher? the root of $N$th transpose matrix For $n=3,$ $L$ matrix is as below:  $$ \left[\begin{matrix} 1&amp;0&amp;0\\ -1&amp;1&amp;0\\ -0.5&amp;-0.5&amp;1\\ \end{matrix}\right] $$  for $n=4$ we have:  $$ \left[\begin{matrix} 1&amp;0&amp;0&amp;0\\ -1&amp;1&amp;0&amp;0\\ -0.5&amp;-0.5&amp;1&amp;0\\ -1/3&amp;-1/3&amp;-1/3&amp;1 \end{matrix} \right] $$  and for $N$th we have: $$ \left[ \begin{matrix} 1&amp;0&amp;0&amp;0&amp;\cdots&amp;0&amp;0\\ -1&amp;1&amp;0&amp;0&amp;\cdots&amp;0&amp;0\\ -0.5&amp;-0.5&amp;1&amp;0&amp;\cdots&amp;0&amp;0\\ \vdots&amp;\vdots&amp;\vdots&amp;\vdots&amp; &amp; \vdots&amp;\vdots\\ -1/(N-2)&amp;-1/(N-2)&amp;-1/(N-2)&amp;-1/(N-2)&amp;\cdots&amp;1&amp;0\\ -1/(N-1)&amp;-1/(N-1)&amp;-1/(N-1)&amp;-1/(N-1)&amp;\cdots&amp;-1/(N-1)&amp;1 \end{matrix} \right] $$  How to get the roots (eigenvalues) of the $N$th order of the $L+L^T$ matrix? is there a specific logic between the roots of this matrix? nginx config fails with SSL key/pem (unique case) I am trying to install SSL on my nginx reverse proxy with certified ssl keys but i get this message when i try to restart server:  Restarting nginx: [emerg]: SSL_CTX_use_PrivateKey_file("/etc/nginx/conf.d/cert.key") failed (SSL: error:0906D06C:PEM routines:PEM_read_bio:no start line error:140B0009:SSL routines:SSL_CTX_use_PrivateKey_file:PEM lib) configuration file /etc/nginx/nginx.conf test failed   everyfiles are root:root with 600 permissions i've tested the certificats and they are validated with this website:   there are no trailing weird caracters in my keys, and has 64 caracter per line  here is my config file  server {     listen   443;     server_name     my.domain.com;     ssl on;     ssl_certificate      conf.d/cert.pem;     ssl_certificate_key  conf.d/cert.key;      location / {          proxy_pass         http://upstream1;          proxy_redirect     off;          proxy_buffering    off;          proxy_set_header        Host            $host;          proxy_set_header        X-Real-IP       $remote_addr;          proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;     }   }  Any ideas? Thank you How to get perfect UV sphere Mercator projection? I'm trying to unwrap a UV Sphere and I can't seem to get a perfect  projection. What process should I follow to get a perfect UV unwrap that looks like the black grid lines in this image?: Fine grained suspension 3-manifold examples of homomorphisms between fundamental groups that are not induced by continuous maps Using the itemize environment inside a caption The following code does not compile. However, if I remove the itemize environment it does. I googled for this problem, and found suggestions that using the caption package would solve the problem, though I did not find any clear description of why the problem occurred in the first place. See for example    I'm using Debian squeeze with TeX Live 2009-11. The included version of caption has   \ProvidesPackage{caption}[2009/10/09 v3.1k Customizing captions (AR)]   I also tried downloading and using the caption package from     but this doesn't change anything. I put the sty files in my current directory. I assume that overrides the system files. This one corresponds to  \ProvidesPackage{caption}[2010/01/09 v3.1m Customizing captions (AR)]   Error message and example file follow.  *******************************************     ERROR: Argument of \@caption has an extra }.  --- TeX said --- &lt;inserted text&gt;                  \par  l.13     }  --- HELP --- From the .log file...  I've run across a `}' that doesn't seem to match anything. For example, `\def\a#1{...}' and `\a}' would produce this error. If you simply proceed now, the `\par' that I've just inserted will cause me to report a runaway argument that might be the root of the problem. But if your `}' was spurious, just type `2' and it will go away. ******************************************************  \documentclass{article} \usepackage{caption} \begin{document}  \begin{figure}     \captionsetup{singlelinecheck=off}     \caption     {       foo       \begin{itemize}       \item bar       \end{itemize}     } \end{figure} \end{document} Let mods see the names of the flaggers for chat offensive flags There have been    (not to pick on the Bridge, just that these are the ones I found) occurrences where users abuse chat flags to cause drama. Random stuff gets flagged, and users from other rooms are needlessly summoned into the room. The issue is, while mods can tell the room to stop flagging random things, there's no way to enforce this. Spam/offensive flags in chat are anonymous, and can be abused with impunity without the mods finding out. I don't think there's anything stopping a user from letting out an endless stream of flags, annoying everyone. Can mods have the ability to see who flagged a message in chat? Can a Muggle inadvertently create a horcrux-like object? I think that we have it well-established (regardless of whether or not one sees this as flawed logic) that Harry is not a Horcrux.  A Horcrux has to be made intentionally, and the recipient is cursed and classified as an "evil object," etc.  Neither of which is true for Harry - so, as stated by JKR herself, Harry is not a Horcrux as such.  But the fact remains that murder can, in fact, accidentally create something that shares a key property of the Horcrux: the soul splits, attaches itself to the nearest recipient, and lingers inside.  As it does in Harry's case.  So my question is: is this only true for wizards?  A Muggle cannot utilize a spell to create a Horcrux.  But, if a Horcrux-like object / being can be created accidentally through murder without intentional Horcrux-creating spells, can this also happen in the case of a Muggle committing murder?    Can a Muggle commit murder, have their soul split, and have the piece of the soul inadvertently attach itself to something nearby without any Horcrux-creating spell being cast? I started by Time Series Analysis by Hamilton, but I am lost hopelessly. This book is really too theoretical for me to learn by myself.   Does anybody have a recommendation for a textbook on time series analysis that's suitable for self-study? Finitely generated monoids- axiomatization- compactness theorem. A question about long exact sequence of finite dim vector spaces How do I find out which dlls an executable will load?