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Questions tagged [align]

{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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239 votes
5 answers

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 ...
Larry Wang's user avatar
  • 3,425
196 votes
5 answers

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 ...
niklasfi's user avatar
  • 2,193
35 votes
7 answers

Vertical alignment of align* in enumerate

Related (but not the same): Align number from enumerate with equation Displaying an equation in a list Earlier today I asked a question about aligning equations in an enumerate environment and ...
Sophie Alpert's user avatar
19 votes
2 answers

What is wrong with defining \bal as \begin{align}?

I'm trying to define two commands \bal and \eal instead of inserting \begin{align} and \end{align} in my document, but in the code below, I'll get some errors. What is wrong with it? \documentclass{...
Vahid Damanafshan's user avatar
22 votes
3 answers

Using \left( & \right) around amsmath's align delimiter ("&")

I want to align equations (using the align environment from the amsmath package) inside matching \left( and \right) commands. For example: \documentclass[a4paper,12pt]{article} \usepackage{amsmath} ...
Samir Unni's user avatar
186 votes
4 answers

How to get only one vertically centered equation number in align environment with two equations

What I have are two equations with align and I want one single equation number to refer to this system of equations. To illustrate, I have \begin{align} dr_t &= \kappa ( \theta - r_t ) dt + \...
Paul Koer's user avatar
  • 3,365
51 votes
4 answers

Remove vertical space around align

I need to display math in my report, but is it possible to remove the vertical space around align*? A little example is the following (where I just want the align* to have the same vertical space as ...
The87Boy's user avatar
  • 1,513
47 votes
1 answer

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 ...
masfenix's user avatar
  • 1,419
35 votes
4 answers

How can I break an align environment for a paragraph?

I would like to have two displayed equations, broken by a short paragraph, but with aligned equal signs (as if using the align environment). Is there some way to "break" the align environment ...
Kristen's user avatar
  • 4,933
128 votes
8 answers

How to align a set of multiline equations

I am trying to align a set of long equations, that are themselves align environments as most of them are spreading on multiple lines. Currently I just have a sequence of align environments, with ...
SeismicVibrations's user avatar
17 votes
2 answers

Enumerate formulas

I'm writing a math paper in LaTeX and for math formulas I'm just using $$math formula$$. Is is possible to numerate formulas? Or do I have to you use some specific commands such as align?
yoanab's user avatar
  • 331
13 votes
1 answer

Spurious space above align environment at top of page/minipage

It seems that the align environment adds additional vertical space if it starts at the top of a page or minipage. Below are two pages, and two minipages (on Page 1), where the first page/minipage has ...
Peter Grill's user avatar
171 votes
6 answers

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 ...
digit plumber's user avatar
7 votes
3 answers

Aligning equations with left and right comment

I'd like to align multiple equations below each other such that the central operator is always centered, but have a column for commenting on the right and a column for \iff-arrows and \Rightarrow-...
黄雨伞's user avatar
  • 238
47 votes
3 answers

How can I use an align environment flush left?

Is there a way possible to imitate the align environment for math mode commands, without having all writing being placed toward the center on the output page? MWE: \documentclass{article} \...
night owl's user avatar
  • 7,333
268 votes
4 answers

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}
Bogdan Lataianu's user avatar
123 votes
7 answers

Align equation left

Here is my split equation: \documentclass{article} \usepackage{amsmath} \begin{document} \begin{equation} \begin{split} a_{ijk} =& \frac {Pr(M_{I} =2 \& M_J=1 \& M_K =1 | I=i , J=j , K=...
user35571's user avatar
  • 2,067
73 votes
1 answer

Aligning equations with text with alignat

I'm trying to add this expression to my work: I understand that the best way to achieve this is using the alignat environment within the amsmath package, so I tried the following: \begin{alignat*}{3}...
Sergio S.'s user avatar
  • 895
21 votes
1 answer

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 "...
Mathieu Larose's user avatar
20 votes
1 answer

What's the right space to right the alignment of a right aligned align environment?

As Hilbert would have put it, had he lived in the TeX-era: No one shall expel us from the Paradise that AMS has created. and one aspect of that paradise is release from the tyranny of eqnarray by ...
Andrew Stacey's user avatar
104 votes
4 answers

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 &...
Gordon Gustafson's user avatar
29 votes
2 answers

Equations inside enumerate aligned on item's number

If I type \begin{enumerate} \item \begin{align*} eqn 1 eqn 2 \end{align*} \end{enumerate} the label will appear on the first lines and the equations will ...
richtera's user avatar
  • 1,501
27 votes
1 answer

How to left align a set of equations

I wanted to left align a set of equations. I've tried the solution provided in aligning to the left. It worked. But, I wanted to have a single equation number for the entire flalign in order to refer ...
user492884's user avatar
16 votes
1 answer

How to split and align equations when they are inside an enumerate environment?

How to make the first line of aligned equations sit in the same baseline as the bullet and make the equation left justified? \documentclass{article} \usepackage{amsmath} \begin{document} \begin{...
kiss my armpit's user avatar
25 votes
2 answers

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 ...
Peter Grill's user avatar
15 votes
3 answers

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}}{\...
pluton's user avatar
  • 16.2k
60 votes
4 answers

side-by-side equations, with equation numbers for each

The align command from amsmath allows me to put two equations side-by-side: \begin{align} x = y && a = b \end{align} Unfortunately for my purposes, this shows both equations under one ...
SuperElectric's user avatar
41 votes
5 answers

How to correctly format (and align) a LaTeX proof?

I'm new to LaTeX and I'm trying to figure out how to correctly format a proof. Can someone show me a basic template for how to do this? The part I am having the most trouble with is creating new ...
Alex Lockwood's user avatar
68 votes
1 answer

What is the difference between split, multline, align, breqn for breaking an equation into multiple lines?

Sorry, if this question sounds a bit amateurish, but I haven't been able to find a good summary about the differences between these four environments for multi-lining an equation. Where do they differ ...
xji's user avatar
  • 1,215
20 votes
3 answers

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 ...
Torsten Schönfeld's user avatar
15 votes
5 answers

problem using option fleqn in amsmath package

I'm using the following code. What should I do if I don't want the fixed indent from the left margin of my page? ‎ \documentclass[‎fleqn,oneside‎]{article}‎ ‎\usepackage{amsmath}‎ .... \begin{align} ...
Mesar's user avatar
  • 805
11 votes
1 answer

Measuring align

From what I read it seems that align environments are processed twice: the first time for measuring, the second time for actual typesetting. My question is whether one can get access to these ...
Stefan Witzel's user avatar
60 votes
3 answers

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) \\ R(-...
mbauman's user avatar
  • 1,302
35 votes
3 answers

Use flalign or alignat or align or similar environment to align to the left

The following is a small example to use flalign environment to generate equation. \documentclass{article} \usepackage{amsmath} \usepackage{txfonts} \begin{document} The formula is: \begin{flalign*} ...
warem's user avatar
  • 3,179
30 votes
3 answers

Alignment of equals sign in multiple align environments

I have multiple align environments in my document, separated by a small paragraph of text: \begin{align*} foo &= something very very long compared to the other align \end{align*} explanation ...
andri's user avatar
  • 535
22 votes
2 answers

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 ...
Dan's user avatar
  • 447
48 votes
4 answers

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]{...
BillyJean's user avatar
  • 1,713
14 votes
3 answers

Numbering a set of horizontally distributed equations

Having different horizontally distributed equations inside an align environment, only lines are numbered, but not individual equations. How can the left equations be numbered using subequations? ...
jjdb's user avatar
  • 2,228
12 votes
3 answers

\left and \right in equation across multiple lines [duplicate]

Possible Duplicate: Left/Right across multiline equation Could someone explain why I can't get the left and right commands to work correctly code: \documentclass{article} \usepackage{amsmath} \...
puk's user avatar
  • 3,001
7 votes
1 answer

Environment aligned doesn't output first part in bracket

\begin{equation} \begin{aligned} [c\mathbf{v}+c'\mathbf{v}',\mathbf{w}]=&c[\mathbf{v},\mathbf{w}]+c'[\mathbf{v}',\mathbf{w}],\\ [\mathbf{v},c\mathbf{w}+c'\mathbf{w}']=&c[\...
eccstartup's user avatar
6 votes
2 answers

Can I tab inside of align environment?

I currently have this ugly equation: The green alignment is just like I want it. The Red one is what I would like to get, but I don't know how. Here is my MWE: \documentclass[a4paper]{scrartcl} \...
Martin Thoma's user avatar
  • 18.3k
88 votes
3 answers

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 }...
codd's user avatar
  • 1,199
43 votes
1 answer

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 \\ \...
IARI's user avatar
  • 1,435
33 votes
2 answers

What's the difference between align and align*?

After some brief searching I can't find the difference between align and align*. Google summarily ignoring the * is making it harder I think. Can you tell me the difference between these two? ...
Harold's user avatar
  • 1,519
24 votes
4 answers

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....
Joshua's user avatar
  • 417
24 votes
6 answers

\overset and align environment: how to get correct alignment?

I'm using the align environment together with the \overset command to put some text over a relation symbol. Here is my MWE: \documentclass{article} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc}...
Rackbox's user avatar
  • 887
21 votes
2 answers

Footnote in align environment

It appears that one is not supposed to use \footnote in math mode as per this appropriately named question: Footnote in math mode. However, it appears that I can get it to work without having to ...
Peter Grill's user avatar
20 votes
3 answers

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 ...
Björn Pollex's user avatar
18 votes
4 answers

How to align multiple subfigures in a grid?

I have three images and I want to align them in the way that one image is above the other two. Here's an example: How can I achieve this? For my other figures I use the subcaption package, but I am ...
Crine's user avatar
  • 365
13 votes
2 answers

Selective numbering of equations with align

I have an align environment with 5 equations. I want 3 of them numbered, and the other 2 not numbered. I understand that there's other posts on the issue of selective numbering of those equations that ...
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