{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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12
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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! ...
47
votes
4answers
9k views

What does a double ampersand (&&) mean in LaTeX?

I've seen several answers that use the double ampersand, but I can't figure out exactly what it does. I tried this out: \begin{align*} \frac{3x + y}{7} &= 9 & \text{given} \\ 3x + y ...
20
votes
2answers
15k views

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 ...
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 \\ ...
11
votes
2answers
40k 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} ...
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})} ...
12
votes
1answer
93k 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 , ...
25
votes
1answer
17k 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 ...
9
votes
2answers
9k 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 ...
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 ...
17
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
655 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 ...
8
votes
3answers
959 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 ...
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 ...
8
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*} & ...
6
votes
3answers
7k 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. ...
5
votes
1answer
5k 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
1answer
830 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 ...
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 ...
9
votes
1answer
729 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 ...
7
votes
1answer
674 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 - ...
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
280 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} ...
4
votes
1answer
410 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} ...
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
632 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 & ...
12
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
701 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} & = ...
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
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} ...
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} ...
7
votes
1answer
36k 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 ...
2
votes
1answer
263 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 ...
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 ...
14
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 ...
11
votes
5answers
839 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
18k 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 ...
9
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)] &&= ...
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
8k 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 ...
4
votes
2answers
409 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
421 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\\ ...
13
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 ...
11
votes
2answers
347 views

Compute remaining horizontal space in align environment

I use align* often and sometimes it is preferable to add text to the right hand side of an equation instead of using \intertext, or \shortintertext, which tends to interrupt the math flow. This is ...
11
votes
1answer
449 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 $z$. ...
9
votes
5answers
4k views

How to subtract two equations?

I am trying to subtract one equation from another but I can't get it to display the way that I want. This is what I have right now. \begin{align*} &y&=2x+5\\ -&&\\ ...