It seems that if I write too many lines of equation within an align environment after some text, that environment will not span more than one pages, and leave blank at the bottom half of the previous page. How can I make it span more than one pages? Thanks.
I do have a longer paper. In one chapter I got several multiline equations, which I wrote using the align environment from amsmath-package. Actually those are quite long computations which should break anywhere for avoiding to much empty space on a page.  I want to use something like \allowdisplaybreaks, which does exactly what I want. The problem is, that I do not want to allow displaybreaks anywhere else in the document, where I have no control about it. I tried to use \allowdisplaybreaks directly before \begin{align}, hoping it would only apply on the next following align-enviroment. But it applies to every align-environment later in the text.  Is there any way to "stop" the command again?  And yes, I could use \displaybreak for single breaks, but I had to use it in many equations and I needed to put it in every single line, since the pagebreak should move, if I add a few more lines anywhere in the chapter.   Thanks for your help, Greyfox
Is (rest) mass quantized? I learned today in class that photons and light are quantized.  I also remember that electric charge is quantized as well.  I was thinking about these implications, and I was wondering if (rest) mass was similarly quantized.  That is, if we describe certain finite irreducible masses $x$, $y$, $z$, etc., then all masses are integer multiples of these irreducible masses.  Or do masses exist along a continuum, as charge and light were thought to exist on before the discovery of photons and electrons?  (I'm only referring to invariant/rest mass.) What does the register keyword do in C language?  I have read that it is used for optimizing but is not clearly defined in any standard.  Is it still relevant and if so, when would you use it? \textcite macro produces "Author (year)" correctly but colours first paren with hyperref Is it possible to copy text from image? Is there any tools to copy text from video's or images? Which answer is correct?       Tony _______to have children until his little daughter was born. After   she won his heart, he decided he wanted a big family.       A. didn't want.   B. hadn't wanted.   This is a multiple choice question from the Understanding and Using English Grammar Workbook 3rd edition by Betty Azar. To me, both answers are correct as I cannot see the diffrence. Please show me the wrong option to delete. How to mount a remote (over SSH) directory to be available like a local directory (incl. in shell, not just in Gnome)? Let $\mathbf A, \mathbf B$ be Hermitian matrices of the same size. What is the characterization of $\mathbf A, \mathbf B$ such that $p(\lambda)=\det(\mathbf A-\lambda\mathbf B)=0$ has only real roots?   If $\mathbf B$ is positive definite (I corrected this), it is easy to see $p(\lambda)$ has only real roots. How to select the most recent set of dated records from a mysql table I am storing the response to various rpc calls in a mysql table with the following fields:  Table: rpc_responses  timestamp   (date) method      (varchar) id          (varchar) response    (mediumtext)  PRIMARY KEY(timestamp,method,id)   What is the best method of selecting the most recent responses for all existing combinations of method and id?   For each date there can only be one response for a given method/id. Not all call combinations are necessarily present for a given date. There are dozens of methods, thousands of ids and at least 365 different dates    Sample data:  timestamp  method  id response 2009-01-10 getThud 16 "....." 2009-01-10 getFoo  12 "....." 2009-01-10 getBar  12 "....." 2009-01-11 getFoo  12 "....." 2009-01-11 getBar  16 "....."   Desired result:  2009-01-10 getThud 16 "....." 2009-01-10 getBar 12 "....." 2009-01-11 getFoo 12 "....." 2009-01-11 getBar 16 "....."   (I don't think  is the same question - it won't give me the most recent response) When a 'blur' event occurs, how can I find out which element focus went *to*? Suppose I attach an blur function to an HTML input box like this:  &lt;input id="myInput" onblur="function() { ... }"&gt;&lt;/input&gt;   Is there a way to get the ID of the element which caused the blur event to fire (the element which was clicked) inside the function? How?  For example, suppose I have a span like this:  &lt;span id="mySpan"&gt;Hello World&lt;/span&gt;   If I click the span right after the input element has focus, the input element will lose its focus. How does the function know that it was mySpan that was clicked?  PS: If the onclick event of the span would occur before the onblur event of the input element my problem would be solved, because I could set some status value indicating a specific element had been clicked.  PPS: The background of this problem is that I want to trigger an AJAX autocompleter control externally (from a clickable element) to show its suggestions, without the suggestions disappearing immediately because of the blur event on the input element. So I want to check in the blur function if one specific element has been clicked, and if so, ignore the blur event. I haven't played Magic: the Gathering since the days of Onslaught and Mirrodin, and I would like to try to catch back up. Since all my cards are quite dated now, I may be more interested in formats other than the most up-to-date one.  Rather than ask what is currently legal in various formats (since that is likely too localized), I would rather pose the question of how can I tell which sets/cards are legal in each format. My equation is not showing big bracket and not showing in next line \begin{equation} g(f,t) = \begin{cases}          \bigl{b^Nt^N^-^1e^2^\pi^b^t cos(2\pi ft),  \text{t\geq 0;}\\          0 \text{ $ otherwise $}          \end{cases} \end{equation} latex table border dont appear / to big / to small Detect if an outgoing call has been answered If $a, b, c$ be distinct reals such that $$a + \frac1b = b + \frac1c = c + \frac1a$$ how do I find the value of $abc$?  The answer says $1$, but I am not sure how to derive it. Have you ever notice the sunset's image in the sea? It's like long light path to the end of the horizon! I've attached a sample of this:     How can we explain this? I know that it can happen even in wave less sea or lake! Why is this path so continuous? I expected that sea should act like a mirror! Print leading zeros with C++ output operator? Emails Per Invocation Still Capped at 100? Expectation values of the position operator is equal to zero in case of even potentials? Matrix Multiplication in context of row and column vectors Defend against flag spam in chat We have incidents where we get 10+ flags from the same room in rapid succession. This happens on multiple occasions and we have reason to believe it's a single user doing this.  I don't think it's of value to allow a single user to flag more then n messages in a small time period.  If we could have some anti-flag spam measures put in place, then that would be great.