{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.
141
votes
7answers
6k views
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 ...
36
votes
4answers
17k views
eqnarray vs align
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. What is the difference between them, and how do I ...
16
votes
1answer
865 views
Changing the apperance of equation numbers with amsmath
For equations in my document, I use the facilities of the amsmath package. In order to make the equation numbers more eye-catching, I want them to be in boldface and a little bit indented to the ...
19
votes
2answers
3k views
Separate long math text under sum symbol into different lines?
I have the following equation, where there is a lot of stuff under the sum symbol:
\begin{equation}
d(\vec{x},\vec{y})=
\sum_{Z_{xy}\in\vec{Z}_{xy},\forall x\in\vec{x},\forall y\in\vec{y}}
...
32
votes
4answers
31k views
How can I split an equation over two lines
I am having the following equation:
\begin{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)} ...
33
votes
2answers
3k views
align vs equation
I always use align in my documents, and avoid equation. Is there anything wrong with that? My reasoning behind this: align > equation, so why not use it?
38
votes
2answers
2k views
How do I number equations only if they are referred to in the text?
I have a paper where all equations are numbered, but I want to number equations only if they are actually referred to in the .tex file using \ref{}. How can I make that happen? Alternatively, how can ...
20
votes
3answers
4k views
How to get only one vertically centered equation number in align environment with two equations
sorry if this has been answered before, I couldn't find anything through search. I'm sure its a common problem though.
What I have are two equations with align and I want one single equation number ...
15
votes
5answers
2k views
Align two inequalities
I am trying to align two inequlities vertically. The \le signs should have the same horizontal positions and the term in the should be centered. My first attempt:
\begin{align*}
\sum a &\le \sum ...
9
votes
5answers
984 views
Help me to write Long LaTeX equations fast with colours and possibly with other aids
I am too slow LaTeX-typist, for example with the equations below I cannot find where I am missing some bracket. Could someone offer me some computational method? I use Vim but I am happy with any ...
34
votes
3answers
1k views
Which command should I use for displayed equations?
A number of related questions have already been asked about this issue:
align vs equation
which is preferable to
what to do with this hyperref note on amsmath
and even eqnarray vs align
But I'm ...
13
votes
3answers
4k views
Aligning across 'aligned' equation blocks
I'd like to format two groups of equations such that all their equal signs line up and such that I can put a big brace to the right of each block to annotate that block. The last part is easily ...
25
votes
3answers
5k views
How can I get rid of indentation after an equation?
I'm a total newbie to LaTeX and I get very annoyed about this. Every time I write an equation, the text following the equation has some indentation but I don't want it to be there!
Look at the ...
16
votes
4answers
870 views
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}
...
6
votes
4answers
2k views
Diagonal strikeout starting too low and ending too high
I want to strikeout an equation with diagonal line but I've not managed to get the diagonal line to draw as I want. The closest I've gotten is via the first example in Frédéric's answer of \cancel ...
22
votes
3answers
2k views
What are the differences between $$, \[, align, equation and displaymath?
I once learnt, that it is uncool to use $$, but why is that? Why does \[ not act as a abbreviation to \begin{align}? I noticed, that there is a difference, since one cannot use & and \\ inside a ...
18
votes
2answers
4k views
Highlight an equation within an align environment
I would like to define a command that puts a red box around an equation with yellow highlighting. I have the basics working pretty well. What I am unable to figure out is:
How to keep the alignment ...
12
votes
1answer
5k views
How can I have a bigger integral (\int) delimiter?
I'm writing some integrals and I don't like the way the \int symbol is displayed when it is followed by a big delimiter.
Here's the code:
\[
\int_S\biggl(\nabla\times\bar B - \mu_0\bar J -
...
15
votes
4answers
4k views
Making a new environment combining equation and split
I'm trying to define a new environment that consists of a split environment inside an equation environment. But I'm getting an error. Here's what I'm doing:
\documentclass[a4paper,12pt]{article}
...
13
votes
2answers
275 views
How do I show the equation formula again instead of its number of ref?
I have an equation:
\begin{equation}\label{eq:equation}
f(x)=x
\end{equation}
I would like to refer to this equation and show the whole formula again, and not only its number. In other words, I ...
11
votes
2answers
10k views
Attractive Boxed Equations
I often used \boxed{...} from the AMS math package to place a box around important equations. However, this approach often produces somewhat awkward looking output. Consider
\documentclass{article}
...
9
votes
3answers
316 views
How can I number a few equations together
i would like to write few equations, but all the equations will get only once numbered and in the middle (right side) of the equations. e.q. if i write 3 equations, the number will be to the right of ...
7
votes
1answer
739 views
Blank lines in align environment
Is there a way to insert a blank line between two equations in
align environment?
From what I understand a blank line is interpreted as \par and
\par is not allowed in align. Can I disable this ...
7
votes
2answers
841 views
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.
6
votes
1answer
2k views
Left align (to the page) displayed math
How can I left align the display math environment (either $$ or \[)? I keep running into people asking about the align environment; but I just want to change displayed math from center to left align ...
3
votes
2answers
803 views
How to export a equation as a image without background?
For example, if we have a equation on a file like:
\documentclass[12pt]{standalone}
\usepackage{varwidth}
\usepackage[utf8x]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath, amssymb, ...
31
votes
11answers
2k views
Embedding LaTeX equations into a webpage
I'd like to include some basic math equations into a webpage. Is there an easy way of either compiling the LaTeX into an image which I can upload, or else of having the browser parse the code?
24
votes
4answers
547 views
How to write a perfect equation parameters description?
A symbols or parameters description is shown below, however, the = and the details of parameter are not aligned.
I want to make a parameters list for a equation like this, in which symbols, = and ...
23
votes
4answers
28k views
How can I change the font size in math equations?
I find that whenever I'm typing some equations into a document, and the equation gets a bit complex (let's say a fraction in a parentheses, squared, inside a square root, inside a fraction), the ...
16
votes
2answers
5k views
align* but show one equation number at the end
I am using align*, but I still need an equation number. I know one solution is to use align and add \nonumber to all lines but the last. Is there a 'lazy' way to do it?
I searched a little and found ...
14
votes
5answers
1k views
For formal articles, should a displayed equation be followed by a punctuation to conform to the language grammar ?
For formal articles, should a displayed equation be followed by a punctuation to conform to the language grammar ?
For example:
The most well-known physics formula is
\[E=mc^2.\] %should I put ...
17
votes
3answers
2k views
Centering \vdots in a system of many equations
I have a system of equations with an arbitrary number of equations (k). I'd like to use \vdots to compactly describe the system, like so:
\begin{align*}
R(-1) &= \sum_{i=1}^m A(i)R(i-1) \\
...
11
votes
1answer
4k views
How can I add left aligned text to an equation?
I have a document I am trying to copy to learn TeX. Here is what I have encountered: How can I have the "or" in the equation. This is what I have right now:
\[ f = ma; \]
But $a$ is the change in ...
9
votes
3answers
4k views
Uncover a multiline equation with beamer
I am using the beamer class for a presentation and amsmath package for the math mode.
If I uncover the formula in the following way, the formula jumps between slides, which is not intended.
...
8
votes
1answer
859 views
How to organize labels when there are too many equations?
I'm writing a moderately long text using LaTeX, and it's great to be able to organize chapters, sections, appendices, and everything else almost automatically. One thing has been bothering me though. ...
10
votes
3answers
627 views
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}
\begin{equation} % not working!
F(V, T) = E(V) + D(T)
...
9
votes
3answers
7k views
Show equation number only once in align environment
I want the equation number to be shown only at the last line, or better, somewhere in the middle of all. So instead of (1), (2), ... only (1).
I use \begin{align} ... \end{align}
8
votes
2answers
2k views
A lateral brace to group a set of equations with labels
I have a set of equations that I'd like to display together (as an example, the Maxwell's equations).
Requirement #1: I'd like to have them labelled like in an align environment
\begin{align}
...
7
votes
1answer
141 views
custom automatic equation numbering
I just read a book where the equations in the Introduction were numbered slightly differently compared to the other sections, namely by (In.x) where x stands for the number (so it starts off as ...
18
votes
3answers
11k views
Label equation with a symbol
I would like to label an equation with an arbitrary symbol, rather than a number, or letter. Is this possible?
3
votes
1answer
376 views
Left-hand vertical rule applied to flalign environment with automatic pagebreak
I am referring to the coderule environment (see Override \centering to left justify an image) presented earlier by @TH as answer to the following question: Override \centering to left justify an image ...
11
votes
2answers
812 views
inserting sentences between subequations
My apologies for asking so many questions here. I want to introduce a sentence in between 2 subequations which is not in math mode. Here is the code that I am using:
...
9
votes
1answer
3k views
Left/Right across multiline equation
I have a multiline equation that I want to have matching sized parentheses. The advice I read online was to use \left( equation \right. \\ left. rest-of-equation \right) . However, this syntax leaves ...
4
votes
5answers
1k views
How can I auto adjust a equation to appear in the entire page? (Scale to equations, is this exist?)
If I have a document like this:
\documentclass[landscape, 12pt]{report}
\usepackage[landscape]{geometry}
\usepackage[utf8x]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath, amssymb, ...
21
votes
5answers
2k views
Multicol layout for systems of (linear) equations
How can a similar arrangement be archived (with ams*, aligned, multicol, etc)
1.2.3 Solve the following system of equations:
a) x - 2y - 4z = 1 b) -23x + 43y = 22
3x - ...
24
votes
3answers
3k views
How can I get an underbrace and an overbrace to partially overlap in an equation?
Sometimes I want to describe portions of an equation using \underbrace and \overbrace in such a way that the portions are not completely distinct, for example:
/-------\
x = A + B + C + D + E
...
20
votes
2answers
2k views
Table of Equations
I've looked around for this, and haven't been able to find a satisfactory answer; How would one go about producing (automatically) a table of equations, just a numbered list of used equations, ...
17
votes
2answers
1k views
Typesetting Right-to-Left math
UPDATE:
I've managed to produce something that is aesthetically correct, however with a lot of "hardcoding" and trial and error to manually measure my spaces. Not to mention that I have to write my ...
13
votes
3answers
1k views
Exporting all equations from a document as individual svg files
I'm currently a presentation based on a paper originally written in Latex. Currently, I use Kile and Ubuntu for my work.
What I'm finding is that I need a large number of the equations from the ...
26
votes
5answers
1k views
LaTeX accessibility
Does anyone know of any LaTeX modules that makes the pdf output generated by pdflatex Americans with Disabilities Act of 1990 (ADA)/Seciton 508 compliant?
Specifics:
With regard to math. One simple ...
