# Tagged Questions

{equations} is about the various environments to typeset displaystyle mathematics, e.g. equation and {align}. For general questions about mathematical typesetting use {math-mode}. Both tags are possible on the same question.

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### Why is $…$ preferable to $$…$$?

I've heard that you should use $...$ for displayed equations instead of $$...$$, but why is that? I'd assumed that it's so that you can more easily tell which are starting and which are ending ...
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### Making equations copyable in pdf

I would like to write a .pdf, where my readers could copy the rendered formulae and paste them directly in their TeX documents. And the copied text would automatically be: \int x\sin ax\;\mathrm{d}...
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### eqnarray vs align

Motivation I want to include a list of related equations, say, for a proof, in my LaTeX document. As far as I know, I have two good options, eqnarray and align. Question What is the difference ...
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### How can I split an equation over two lines

I am having the following equation: Q(\lambda,\hat{\lambda}) = -\frac{1}{2} P(O \mid \lambda ) \sum_s \sum_m \sum_t \gamma_m^{(s)} (t) \left( n \log(2 \pi ) + \log \left| C_m^{(s)} ...
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### How to break a long equation? [duplicate]

I have a long equation but long enough to occupy two lines. I want to break it to improve readability. How can I break it? F = \{F_{x} \in F_{c} : (|S| > |C|) \cap (minPixels &...
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### Adding letters to equation numbers

I want to number use a equation and add a letter to the equation number such as: f(x) =a x and g(x) = b x (3.1.1a,b) That is e.g. using ... \label{eq} \end{...
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### Multi-page equations — problem

I have a very long derivation, that needs to look like: A = B \\ = C \\ = D \\ etc. The derivation spans across many lines. I'm looking for a way to typeset it so that when it reaches the end of ...
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### LaTeX accessibility

Does anyone know of any LaTeX modules that makes the pdf output generated by pdflatex Americans with Disabilities Act of 1990 (ADA)/Section 508 compliant? Specifics: With regard to math. One simple ...
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### Equation connected by lines

I have written a code that defines a new environment in which aligned equation are connected by lines as in the image: I think it is useful when, inside the align environment, there is the need of ...
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### How to make a standalone document with one equation?

I was surprised to find that standalone package can not compile a document with an equation: \documentclass{standalone} \begin{document} % not working! F(V, T) = E(V) + D(T) \end{...
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### Aligned equations in LaTeX

I have a long equation in LaTeX, which I need to break up into more lines. I've done this, although its not quite what I was looking for. Here is a MWE showing my problem: \documentclass[10pt]{...
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### How to make an equation more compact?

I have an equation that wastes a lot of space around the union symbol: \documentclass{article} \usepackage[cmex10]{amsmath} \usepackage{amssymb} \begin{document} RA_U \left ( new ,...
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### Guidelines for typesetting fractions

I realize that this question is to some extent subjective. However, I suspect that there are some common standards regarding how fractions ought to be typeset in mathematics. The guide Mathematical ...
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### Sharing alignment between equations in two different items

In the following minimal example, I have two equations inside an itemize environment, with an item per equations. Each equation is defined in its own equation environment. \documentclass{article} \...
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### Getting a tikz picture to have an equation number

I make a lot of commutative diagrams and am trying to switch to Tikz from amcd,diagrams, etc. I often have to refer to these diagrams in the text and would rather have them as equations (i.e. with and ...
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### Multiple Alignment in equations

The following equations need to be aligned in two spots. If I use the align* environment then the second column of alignment is pushed to the right edge of the page. I googled this and saw that ...
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### Best typesetting of formula

Consider the following example. \documentclass{article} \usepackage{amsmath} \newcommand*\mathsetfont{\mathbf} \newcommand*\DeclareMathSet[1]{% \expandafter\newcommand\csname set#1\endcsname{\...
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### Placing equation numbers on the right

I am new to TeX and am using scribtex to write a maths paper. When I put the followng code, the equation number is automatically displayed on the left, instead of in the right as is usually done. What ...
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### How to avoid widow lines after displayed equations

If a displayed equation is close to the bottom of the page, TeX likes to insert a page break even if the current paragraph contains only one more line after the equation, as e.g. in ... it follows ...
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### How to globally change the spacing around equations?

How could I go about setting the 'above' and 'below' vspaces around the equation environment? If the same could be done for the subequations or gather environments, this would be a bonus.
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### Should one use thousands separators in equations?

I understand that this is not strictly a TeX question but I have recently been asked to correct an equation presented as the first example in the image below to that of the second example i.e., to use ...