{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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307 views

Two columns of equations, aligned and just one number per column

I'm writing a two-column document, and I want to display two sets of large equations floating at the top. Each equation set should be aligned within the same column, and only the two top equations ...
1
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1answer
94 views

Is it possible to break up an align environment and keep the tab positions? [duplicate]

I'd like to take notes for a math class such that I can typeset a series of equations with the \align environment and make some text notes in between some of the lines. As far as I can tell, though... ...
0
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1answer
120 views

Error message because of eqnarray, footnotes, tables or caption?

I know this is not a minimal example, but I have to have this much code, in order to create my error. I had this error already several times and I cannot get rid of it?! I don't know where the problem ...
40
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4answers
5k 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 ...
8
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3answers
9k 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 ...
12
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4answers
5k 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: ...
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5answers
1k views

Defining `$$$ $$$` to align

I would like to define $$$ \zeta(s) = \dfrac1{1^s} + \dfrac1{2^s} + \cdots $$$ as a short hand for \begin{align} \zeta(s) = \dfrac1{1^s} + \dfrac1{2^s} + \cdots \end{align}` How should I go ...
11
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3answers
11k views

columns/alignment with itemize

I'm trying to make alignment points in a list environment. The following code gives me an error, but it almost compiles to what I want, just missing the bullet points. I must be misunderstanding ...
2
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1answer
230 views

Which one is recommended to split, continue and align a long equation?

In my investigation, the outputs are identical as follows. Version 1: Using aligned. \begin{align*} \framebox[6cm]{Top LHS}\\ \framebox[5cm]{Middle LHS}\\ \framebox[4cm]{Bottom LHS} &= \! ...
13
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2answers
3k views

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 ...
10
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2answers
2k views

In align environment, how can you label some (but not all) of the equations?

I know that the align environment labels all the lines, while the align* environment labels none of the lines. Is there a way to have the align environment label only some of the lines? For example, ...
10
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1answer
3k views

How can I write multi line equations with alignment in inline math mode?

Is there any way to override the fact that certain environments in LaTeX are automatically "displayed"? One such example is the align* environment. I want to keep my aligned equations inline. So ...
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2answers
3k views

Alignment across nested aligned environments

I have a list of equations with annotations like the one below: \documentclass{scrartcl} \usepackage{amsmath} \begin{document} \begin{align} aaaa &= 1 &&\text{for $X$} \\ bbbb &= ...
6
votes
1answer
5k views

Using align in beamer with overlays

How can I get the align environment to play nicely with beamer overlays? As a simple example I would like \begin{align*} a = \frac{bc}{c} \end{align*} on the first overlay and then ...
13
votes
1answer
4k views

Split expressions with parentheses in align environment

I am writing down a rather long expression, which has to be splitted in a align environment. The thing is that this expression has parentheses which have to be splitted too. I don't want to use ...
13
votes
1answer
469 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 ...
11
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3answers
4k 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
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3answers
10k 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 ...
10
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1answer
11k views

Aligning the right parts in multiple \begin{cases}

Is there an intelligent way to left-align the parts right of & of the two cases environments shown below (if x >= 0, otherwise, if y < 0, otherwise). I wonder if there is a better way than ...
8
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1answer
39k 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 , ...
7
votes
2answers
3k views

How to align terms in alignat environment

These are my math equations. To enhance readability, I'd like the third column to be aligned around the + sign; that is, I wish to place some horizontal blank in front of $n\mathbf{A}_0$ (not ...
7
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1answer
210 views

Ignoring specific ampersand formatting on a specific line of an align block

I want to typeset a number of equations with some alignment constraints, but I want to partially ignore them on certain lines. An example formatted text might look like the following when it's ...
7
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2answers
5k views

\mbox does not draw a box inside align*

\mbox doesn't work inside align*: \begin{document} \usepackage{mhchem} \begin{align*} \ce{K_w} &= \ce{[H3O+][OH^-]} \\ -\log \ce{K_w} &= -\log ( \ce{[H3O+][OH^-]} ) \\ -\log ...
6
votes
1answer
168 views

Aligning and centering a lstlisting with two columns on a page

Consider the following code taken from here to produce a fancy listing : % PACKAGES \documentclass[11pt,a4paper]{book} \usepackage[top=1in, bottom=1in, left=1in, right=1in]{geometry} ...
4
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2answers
105 views

How to number two equations as one

\begin{align} ...
3
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1answer
109 views

Aligned equation which can break through pages [duplicate]

I'm writing long sequences of aligned math equations, and LaTeX interprete them as single, unbreakable objects... which is Ok if the equation is nowhere near the end of the page. Q: Is there a way to ...
3
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1answer
2k views

How can I create a multiline split inside of a radical inside of an array environment?

I have an align like this: \begin{align*} \sigma &= \sqrt{\sum_x \left[ (x-\mu_x)^2\mathbf{f}(x) \right] } = \sqrt{\frac{1}{10}\sum_x (x-\mu_x)^2 } \ &= \sqrt{\frac{1}{10}( (0-.45)^2 ...
3
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2answers
4k views

alignat problem

Whenever I try to use the alignat environment, it doesn't seem to work on my computer! I tried the following simple code (my file had \usepackage{amsmath}): \begin{alignat}{3} \min \quad x_1 ...
13
votes
2answers
1k views

Center one equation of many in align?

I have the following align enviroment: \documentclass[12pt]{memoir} \usepackage{amsmath} \begin{document} Here we see \begin{align} \text{cat} &= \text{dog}\\ \text{dog} &= cute ...
10
votes
4answers
312 views

Aligning numbering in a system of equation so it's centered

In the following code ... $\begin{cases} 2y+4x=9 & \text{(I)} \\ 3x-2x=10 & \text{(II)} \end{cases}$ ... I want the (I) to be centered above (II). Right now they are aligned above each ...
10
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2answers
745 views

Horizontal alignment within an equation using Tikz

I am trying to center horizontally the first terms of a system of equations inside the alignat environment. I don't know if Tikz is the right way to go, but as I might have to add some other ...
9
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1answer
159 views

How can I align the terms of this equation nicely?

I have the following alignat segment: \begin{alignat*}{3} \text{max}_{\underline{\lambda}} \text{min}_{\underline{x}} \quad & \underline{c}^T \underline{x} + \underline{\lambda}^T(\underline{d} ...
8
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3answers
205 views

Align matrices problem

I have an equation of matrices and I want to align the dimensions of the matrices below the equation of matrices. However, I produce something very ugly. Can someone advise how to make it look better ...
8
votes
2answers
217 views

Glossaries in Align Environment

Using glossaries commands in align environment seems to screw up the tag alignment. How can I use gls{...} commands in align environments without the tag position being altered? Consider the ...
8
votes
1answer
149 views

How to avoid this undesired horizontal space?

In the following output, why do I get the undesired space before the (, and how to get rid of it globally? Here is my code: \documentclass{article} \usepackage{amsmath} \begin{document} ...
8
votes
2answers
4k views

Label one line in a begin align*

I have the following block of TeX: \begin{align*} m_n^+ = \dfrac{1}{n}\sum\limits_{k=N+1}^{n} =& \dfrac{1}{n}\sum\limits_{k=N+1}^{n}\left(a_k-L+L\right) \\ ...
7
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2answers
2k views

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? ...
6
votes
2answers
85 views

Place table based on position of column break

I have a table with two columns of different widths. I want to place my table in my page such that the line between the two columns falls on the center of the page. If the columns were the same size ...
6
votes
2answers
1k views

Why does aligning equations not work here?

\documentclass{minimal} \usepackage{amsmath} \newcommand*{\op}[1]{\operatorname{#1}} \begin{document} \begin{align*} \noalign{$\quad \op{f} * \op{r} = \op{c}_{\op{f}*\op{r}} (x_1,...,x_k) = ...
6
votes
3answers
358 views

How can I align two split environments at the equal signs?

\documentclass{scrartcl} \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} \usepackage[english]{babel} \usepackage{amsmath, amsthm, amssymb} \usepackage{mathtools} \begin{document} ...
5
votes
1answer
125 views

Equation alignment creating unwanted space

I am defining some text in a align, but no matter how i place the & symbol to create the alignment i get a space between the first chars. \begin{align*} H_0:& \text{Something.}\\ H_1:& ...
5
votes
2answers
308 views

Equation tags for parts of alignments

Consider the following example: \documentclass{article} \usepackage{amsmath} \begin{document} \[ 1+2=3 \implies \left\{ \begin{aligned} &a+b=c, \\ &x=y+z. ...
4
votes
2answers
795 views

proof format 2 columns [duplicate]

Possible Duplicate: How to correctly format (and align) a LaTeX proof? In my proofs I would like to have justifications of each step to the side of the numerical manipulation. For instance ...
4
votes
3answers
481 views

Alignment in multiple locations of a single equation based on first line

I want to align a multi-line equation so that it basically looks like this: a = (b + c + d + e) f = g The requirements of this alignment are: The equal signs should be aligned. The beginning ...
4
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3answers
321 views

Aligning multiple binary operators

Objective I want to align the following: expr_a1 <= expr_a2 <= expr_a3 \\ expr_b2 <= expr_b2 <= expr_b3 \\ Now, I want the <= to be aligned with each other; the expr_*2 to be ...
3
votes
1answer
83 views

Alignment of several case environments at the equals sign

I have several consecutive case environments, each containing a pair of equalities. Within each case environment, I have vertical alignment at the equals signs. I would like all of the equalities to ...
3
votes
2answers
127 views

Problem in alignment of equation using \begin{align} and \begin{split}

I was trying to align these equation but they are stretching out of the document. Even though I used \begin{split} it didn't work. I don't know why this is so? \documentclass{article} ...
3
votes
1answer
201 views

Placing a tikzpicture next to an align

I have a tikzpicture with an accompanying explanation in a math align environment. The tikzpicture is small enough that I'd like the explanation to appear next to (specifically, to the right) the ...
2
votes
1answer
129 views

Equation Number Positioning in Align Environment

How do I control the space between the equation number and the right margin in the align environment?
2
votes
1answer
298 views

Aligning equations

This is very similar to a lot of other questions but I haven't found one that EXACTLY replicates the problem I'm having. I have the following: \begin{align*} &\text{minimize} &R_k + ...