{align} is an environment provided by math packages that permits multiple related equations to be aligned at a common reference point, usually a sign of relation. For general questions about aligning document elements, use {horizontal-alignment} or {vertical-alignment} instead.

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13
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4answers
1k views

Can I get $$…$$ to behave like \[…\]?

Is it possible to modify LaTeX so that good old $$...$$ behaves like \[...\] (and by this I mean that it should be synonymous to it). If yes: Dear LaTeX3 developer, please integrate this into LaTeX3! ...
21
votes
2answers
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Multiple alignment

In the following piece of code \begin{align*} [x \mapsto s]x &= s \\ [x \mapsto s]y &= y \qquad \text{als } y\neq x \\ [x \mapsto s](\la{y}t_1) &= \la{y}[x \mapsto s]t_1 \qquad \text{als }...
17
votes
1answer
105k views

Align equation left

Here is my split equation: \documentclass{article} \usepackage{asmath} \begin{document} \begin{equation} \begin{split} a_{ijk} =& \frac {Pr(M_{I} =2 \& M_J=1 \& M_K =1 | I=i , J=j , K=k)...
16
votes
2answers
2k views

How to align nested cases?

Please consider the code bellow: \begin{align*} function = \begin{cases} case1 &\mbox{if } n = 0 \\ \begin{cases} case2 &\mbox{if } n = 1 \\ ...
15
votes
2answers
43k views

Align multiline equation with expression after equal sign

I am trying to align a multiline equation using array within the equation but it turns out it doesn't do very well. The code I am using is as follows: \begin{equation}\ \begin{array}{lcl} \mathcal{L}^...
13
votes
2answers
15k 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} &\...
19
votes
1answer
2k views

Automatic line break in alignat

Consider the following example from http://tex.stackexchange.com/a/12782/4011 \documentclass{article} \usepackage{amsmath} \newcounter{eqn} \renewcommand*{\theeqn}{\alph{eqn})} \newcommand{\num}{\...
27
votes
1answer
18k views

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 ...
13
votes
2answers
8k views

How do I put a side brace around several lines in the align* environment?

I would like to put a side brace around several lines in the align* environment, as shown in the comments in the code below: \begin{align*} left side & = right side \\ left side & = ...
10
votes
2answers
10k views

overset text over equal sign in in an Align environment

Look at the following example \begin{align} & x \\ \overset{\text{some long explanation}}= & foo \\ & = bar \end{align} what is the best way to get the equal signs ...
9
votes
2answers
4k views

Mix align and enumerate

Is it possible to mix align* and enumerate, for example I want to TeX something like this (item a) and d), b) and e) and c) and f) should be aligned) a) x^2 + y^2 = 1 b) a + b = c c) r-x = y+z d) f -...
7
votes
2answers
3k views

Highlight an equation within an align environment with color option

I'd really like to do exactly what's being asked for in this question: Highlight an equation within an align environment, but with the ability to change the color when I call it, so that I could have ...
19
votes
6answers
7k views

Multiline equation with LHS alone on first line?

I would like my multiline equations to look like this: Left-hand-side of my equation = right-hand-side number 1 = right-hand-side number 2 = etc. I know there is a simple way to do this,...
18
votes
2answers
4k views

Two column align environment with one line spanning both columns

Is there a good/correct way of making an align environment with one line spanning multiple columns? At the moment I'm using a hack like the following, but I feel that it's probably not the best way. ...
15
votes
1answer
681 views

Correct usage of \ifmmode

Seems that there is some subtlety in using \ifmmode that I am not aware of. For some reason, using: \newcommand{\hlcodeA}[1]{\ifmmode\else\small\fi\texttt{\hilight{#1}}}% is not quite identical to:...
8
votes
3answers
1k views

Aligning different parts of an equation with certain spots in the line above

I am trying to get certain parts in the second line of an equation to line up with certain parts in the first line. For example, X=AAA+BBB+CCC = a + b + c where here I am wanting the lower-case ...
9
votes
2answers
5k views

Spacing of \multline inside align (i.e. \multlined)

Related with How can I use multline within an align environment?. Consider this document: \documentclass{minimal} \usepackage{amsmath,mathtools} \begin{document} \begin{align*} & \left[k(k+\...
8
votes
1answer
788 views

Align-environment: Align on the left side

Why doesn't the following code align the two equations in the middle? It does only if I remove the alignment on the left. \begin{align*} &ABC &= ABC - AB\\ &ABCD &= ABC - ...
6
votes
3answers
8k views

\underbrace and align environment

I want to typeset a proof and want to emphasize what I do in each step e.g. by underbracing an equal-sign when I substitute a variable. In addition I also want to align equal-signs in every line. ...
6
votes
1answer
6k views

Automatic equation numbering in LyX

I would like to create automatic numbering of equations in LyX. when I entered \renewcommand\[{\begin{equation}} \renewcommand\]{\end{equation}} for the "equation" environment it worked. However, ...
4
votes
3answers
2k views

Overbrace in amsmath align environment

I have the following rather large equation. \begin{alignat*}{16} 1 &= &&b_m && &c_n + &b_m && &c_{n-1} &&R_L + &b_m &...
4
votes
1answer
893 views

aligning equals as well as plus signs

From this question we know that aligning the equal signs in A = B = C D = E = F is done by using alignat, not align. If we have instead A = W + M = C B = i + \iota = D how can the equal signs ...
9
votes
1answer
776 views

\marginpar and \begin{align}

I want to use \marginpar directly beside a formula within a \begin{align} statement. I tried: \begin{align} E^2 \end{align} \marginpar{Not correct} but the 'Not correct' statement is written ...
5
votes
2answers
1k views

Using tikz command inside tikzpicture environment (alignment problem)

This is a followup question to Expandable nested boxes with TikZ. When using the \tikz command inside the tikzpicture environment, the positioning of the contents is altered. Here are the two ...
4
votes
1answer
356 views

newenvironment: error with \begin{align} and \end{align}

In the example below, an error is caused by \begin{align} and \end{align} but I do not see why: \documentclass{book} \usepackage{amsmath} \newenvironment{subalign}{\begin{subequations}\begin{align}}{\...
4
votes
1answer
454 views

Centering column in alignat environment?

How do I center the contents of each cell in the middle column? I am approximating it with \phantom, but there's got to be a better way. \begin{alignat*}{3} &E&\quad&\mathrm{par}&&...
3
votes
2answers
2k views

Force aligned equation (all the way) to the left?

How do I force the following aligned output all the way to the upper left (right next to the enumerated list item)? I still want the 2nd and 3rd lines to be aligned with it's above equal sign. \...
2
votes
2answers
653 views

Equation Alignment With Steps

I'm trying to show all of the steps for solving a linear equation like this: \begin{aligned} -4(6x - 5) & = 188 \\ (-4*6x)+(-4*-5) & \\ -24x + 20 & = 188 \\ -20 & = -20 \\ -24x & ...
20
votes
1answer
9k views

Uncover lines of an align environment with beamer

Is there any way to uncover equation-lines of an align* environment line per line in a frame conveniently? somethink like \begin{align*}[<+->] a &= b \\ b &= c \\ \...
13
votes
3answers
12k views

AMS Split inside AMS Align

I'd like to have multiple lines inside a single align cell like so: \begin{alignat*}{1} = & \begin{split}x+\\ y\end{split} \end{alignat*} But I get an error like: \end{alignat*} \An extra &...
13
votes
2answers
4k views

Nesting subequations within align

subequations seems to only work outside environments such as align and equation. What if I want to preserve the alignment of the equal signs using align while also would like subequations numbering ...
4
votes
1answer
84 views

Specify number of columns in brqalign

Some time ago David Carlisle wrote an awesome brqalign function in this answer: http://tex.stackexchange.com/a/51543/4011. See the cited code below. How to modify the brqalign environment such that ...
14
votes
4answers
719 views

How do I get this strange alignment?

I would like to get a nonstandard alignment in the following code: \begin{align} \text{First left hand side} & = \text{First right hand side} \\ \text{Second left hand side} & = \text{...
9
votes
1answer
39k views

Getting arguments underneath \min in an align environment

I am wondering how can I ensure that an argument gets placed underneath \min when I use an align environment. When I use math mode and write \[ min_{x_1,\dots x_T} \] the {x_1,\dots x_T} is ...
15
votes
2answers
4k views

Align Equations Over Multiple Tabular Rows

I'm trying to set up a table with some equations in it, however I would like the equations on multiple rows to be aligned properly. So far I have \begin{tabular}{cc} \hline \multicolumn{1}{l}{Header ...
14
votes
4answers
10k views

Problem with beamer's \pause in alignments

I have the following code, (edit:) now without aligned. \documentclass{beamer} \mode<presentation> { \setbeamercovered{transparent} } \begin{document} \begin{frame} \[ \begin{cases} %\...
14
votes
4answers
4k views

Best Pattern For Adding Commentary in align Environment? [duplicate]

I've been using the align environment to line up equations in proofs/explanations/etc and I like to place parenthetical commentary for each step, similar to the code below: \documentclass{article} \...
10
votes
4answers
3k views

Centering equations within alignat command

I want to centre the formula inside the equals. So far I have \begin{alignat*}{2} v_2(16)&=\frac{2}{5}[v_3(32)+v_3(8)] &&= 0, \\ v_2(4)&=\frac{2}{5}[v_3(8)+v_3(2)] &&= 1....
2
votes
1answer
268 views

Custom glossary environment improvement

This is a followup question about the code provided by Nicola Talbot in this question: Automated generation of equation key TL;DR: Defines new environment alignglos which can be used to wrap the ...
15
votes
2answers
2k views

Custom pagebreak in align equation

I got the following problem: Right now I am checking my equations, which are usually written in align. This looks great in most of the cases, but sometimes the pagebreaks are weird, ie there is a lot ...
15
votes
4answers
3k views

Make align* number the last equation

I am using the align* environment to write equations expanding several lines. I would like to define a command sequence in the preamble, such that the last equation of this block will always be ...
12
votes
1answer
455 views

What would be the appropriate technique for typesetting a “where” list of variable specifications after an equation?

I'm often finding I need to lay out an equation in a manner resembling the following source: \begin{align*} x = y + z \end{align*} where $y = $ the value of $y$; $z = $ the value of $z$. ...
11
votes
5answers
883 views

How to make a multiply equation?

I need to make a equation like this 1011 (this is 11 in decimal) x 1110 (this is 14 in decimal) ====== 0000 (this is 1011 x 0) 1011 (this is 1011 x 1, shifted one ...
11
votes
3answers
19k views

aligned environment of amsmath vs array environment

Today I found out the existence of the aligned environment of the amsmath package. However, I can't see the advantage of using it instead of the array environment from the example provided in amsldoc....
7
votes
1answer
1k views

Different space between \align and \equation

Why produce the align and the equation environment different space between the text. And what can I do, that it have the same? \documentclass{article} \usepackage{amsmath} \begin{document} Long ...
6
votes
1answer
9k views

Different spacing around equation and align

In my document, I use align and equation, depending on the length of the equation. They are spaced differently, as you can see on the picture below. I read that comments in the empty lines would help,...
4
votes
2answers
420 views

Aligning tikz picture within text

I want to align my tikz within a text. A sample can be seen at the second picture in the following link: Image courtesy from http://www.echoecho.com/htmlimages08.htm This is my trial: \...
15
votes
3answers
2k views

How to make formulae take equal vertical space in the align environment?

Consider the following code: \begin{align} f_1(x) &= \frac{15x}{3} \\ f_2(x) &= 3x + 5 \\ f_3(x) &= 4x + 13 \end{align} This produces three lines where the first line takes up more ...
14
votes
1answer
433 views

Align to center

I want to align some equations to the equal signs, so I wrote this: \begin{align} -3z &=-9\\ z &= 3\\ -3y-3*3 &= 3\\ y &=-4\\ 2x+8*(...
14
votes
1answer
1k views

Adding multiple paragraphs between aligned equations

Some people have asked about how to add multiple paragraphs (when \intertext and \shortintertext no longer work), a fix was proposed by Peter Grill here: He wrote: My first thought was to hack ...