{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 question about aligning document elements, use {horizontal-alignment} or {vertical-alignment} instead.
36
votes
4answers
16k 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 ...
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 ...
18
votes
2answers
3k 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 ...
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) \\
...
15
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 ...
15
votes
2answers
266 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
1answer
2k views
Flexible equation, align, multline environment
I'm looking for a command (say \foo{}) or pair of commands (say \foos, \fooe) that behave like:
equation environment if there is no \\ nor &
multline if there is a single \\
align if there are ...
14
votes
1answer
651 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})}
...
14
votes
1answer
1k views
What is the difference between \notag and \nonumber in align environment?
I use \notag or \nonumber in align environment but there seems no any difference when display. What is the difference between these two commands?
14
votes
1answer
637 views
How can I typeset LaTeX math proofs with long lines?
I usually typeset math proofs in LaTeX by using the align environment. For instance,
\documentclass{article}
\usepackage{amsmath,mathtools}
\begin{document}
\begin{align}
& x^2 \\
&= x*x \\
...
13
votes
7answers
619 views
Aligning polynomial terms
In LaTeX align, I'm struggling to align polynomial terms and assume there's an easy way to do it. But I cannot find the simple/elegant solution. What I would like is something like this:
x1 + x2 ...
13
votes
4answers
470 views
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 ...
13
votes
3answers
10k views
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*}
...
13
votes
2answers
313 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 ...
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 ...
12
votes
4answers
304 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} & = ...
12
votes
6answers
2k 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 ...
12
votes
3answers
609 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 ...
12
votes
4answers
2k views
Align left-aligned formula at two points
I would like to get this WITHOUT using tables, because in my real equations there are fractions included that are scaled down in tables
a+b+c=1
y =2
My code looks as follows:
\begin{align*}
...
12
votes
2answers
101 views
Align*, & and \futurelet
can somebody explain futurelet within align-environments?
Example:
The command \A should give an "A" if the next char is a {, a "B" if it is & and "C" in any other case.
...
12
votes
4answers
407 views
Best Pattern For Adding Commentary in align Environment?
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}
...
12
votes
2answers
3k views
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 ...
12
votes
1answer
160 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\\
...
11
votes
4answers
355 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
2answers
258 views
Problems with alignment of sequences
I want to align two sequences:
a_1, b_1, c_1, d_1, e_1 etc.
a_2, b_2, c_2, d_2, e_2 etc.
here's what I wrote
\begin{align}
\notag &a_1,\ &b_1,\ &c_1,\ &d_1,\ &e_1\ ...
11
votes
2answers
797 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:
...
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 ...
10
votes
5answers
256 views
How to align the equal signs in this equation such that the first line and last 2 lines align
so I have an equation below.
My latex code for it is:
\begin{align*}
CoJPoD_{ \{I_1, \cdots, I_{k-1}, I_{k+1}, \cdots, I_{n}\} | I_{k} } = CoJPoD_{ \{system \backslash I_{k}\} | I_k} \\
= ...
10
votes
5answers
2k views
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 ...
10
votes
3answers
3k views
Left-justify with align on “=” in align environment
I searched the tex.stackexchange archives for an answer to this question but couldn't find one. I assume it's a common question, however.
I often want to align text similar to the poly environment in ...
10
votes
1answer
86 views
Comment an equation without creating extra space
I try to make a comment on the right (or left) of one line of proof. But the align* environment automatically move the whole equations to the left to leave space for the comment. But I still want the ...
10
votes
3answers
2k views
Defining a shorthand for amsmath's align environment (as commands)
I'd like to define a shorthand command for \begin{align*} and \end{align*}. When I write
\newcommand{\ba}{\begin{align*}}
it works fine. But when I write
\newcommand{\ea}{\end{align*}}
...
10
votes
2answers
187 views
Modify eqnarray to match that of amsmath's align
This is a follow-up question to \eqnarray vs \align.
Sadly, some journals (and their accompanying document classes) still require the use of eqnarray to arrange a number of equations in a single ...
9
votes
3answers
311 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 ...
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}
9
votes
3answers
665 views
Alternative to IEEEeqnarray
By recommendation from The Not So Short Introduction to LaTeX, I have been using the IEEEeqnarray environment a lot, since it solved many of the rather annoying problems related to the ...
9
votes
4answers
155 views
What is the difference between aligned in displayed mode and starred align?
I am confused in choosing one of the following approaches.
\documentclass{article}
\usepackage{siunitx}
%\sisetup{detect-all}
\usepackage{amsmath}
\parindent=0pt\relax
\begin{document}
The following ...
9
votes
5answers
5k views
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}
...
9
votes
4answers
3k 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}
...
9
votes
2answers
1k 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 & = ...
9
votes
2answers
118 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 ...
9
votes
2answers
198 views
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?
9
votes
2answers
799 views
Compact collapsing of equations and paragraphs
I want to duplicate the compact look of G. K. Batchelor's fluid dynamics book. Where a paragraph terminates such that the mathematical expression can collapse up into the vertical space of the ...
9
votes
4answers
2k views
Aligning plain `align` and `cases`?
The cases environment works very well for enumerating cases within a large left bracket. I'd like to be able to combine it with the align environment so that equals-signs and conditions also line up:
...
9
votes
4answers
602 views
Left-aligning specific text in math-mode
I currently have
via
\documentclass{scrartcl}
\KOMAoptions{
fontsize = 10pt ,
headings = normal ,
}
\usepackage{amsmath}
\usepackage{multicol}
\usepackage{siunitx}
\begin{document}
...
9
votes
2answers
150 views
Different symbols in $…$ and align environments
Is there a way to force LaTeX to produce different symbols either in $...$ or \begin{align}...\end{align} environments? For example
$ \mymacro $
should lead to
A
while
\begin{align} \mymacro ...
9
votes
3answers
872 views
Force line break inside a \lim argument in align environment
Inside an align environment I have a \lim with two variables which should be displayed in two lines:
\begin{align}
...
f & = \lim _ {a \rightarrow -\infty \linebreak b \rightarrow \infty} ... \\
...
9
votes
3answers
461 views
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:
...
9
votes
2answers
397 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 ...
9
votes
1answer
710 views
Aligning sub-equations within align
Update:
How do I align both the \sum signs and the = signs in the last two equations? I have updated the picture.
Original Question:
When I use the following code:
\begin{equation}
\begin{split}
...
