{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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2answers
470 views

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 ...
10
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1answer
13k 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 ...
10
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2answers
460 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 ...
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2answers
10k 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} ...
9
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5answers
3k 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\\ -&&\\ ...
9
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4answers
388 views

Aligning mathematical inequalities

I want to align the following at the inequality signs, however it becomes very ugly: \begin{alignat*}{2} ...
9
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5answers
287 views

Left align in math environment with every element over each other

I would like the elements in my math environment to be left aligned, so that each element stands over each other, like in the given example below. I have managed it using \hspace and \qquad, but ...
9
votes
4answers
14k views

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 ...
9
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2answers
8k 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?
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2answers
2k 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
3answers
632 views

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? ...
9
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4answers
386 views

How do I avoid eqnarray?

We have been told to avoid eqnarray and use align instead. The output of eqnarray here: \newcommand{\Prob}{\operatorname{\mathbb{P}}} \newcommand{\tp}{\operatorname{tp}} ...
9
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3answers
152 views

what is the correct way to typeset equations with a leading indicator/marker on each

I am using \begin{align*} to typeset set of equations. I want to say that the first one applies to case of dimension [T] (time), and the second for [L] (length) and the third for [M] (mass). I want ...
9
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3answers
4k views

\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} ...
9
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2answers
5k 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) \\ ...
9
votes
2answers
361 views

how can I align limits at “lim”?

I am trying to align several limit expressions at varying x-values. It seems that align treats the "limit" portion together with its subscript as an entire object, then aligns these limits, which ...
9
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2answers
201 views

How to add equations on top of arrows?

I have the following matrix: $$ \left[ \begin{array}{ccc|c} -4&2&-2&10 \\ 1&0&1&-3 \\ 3&-1&1&-8 \end{array} \right] \sim $$ I want to have something like this: ...
9
votes
1answer
985 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} ...
9
votes
3answers
19k views

Using \gather and \align together

I'm very picky regarding alignment inside my proofs. What's frustrating me right now is that I have some lines that I want to be center-aligned (using \begin{gather}) and others that I wish to align ...
9
votes
2answers
8k 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
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1answer
9k views

Multiple labels in aligned environment

I would like to format an optimization problem by \documentclass{article} \usepackage{amsmath} \begin{document} We want to label each line separately. The inserted text and formulas have to be ...
9
votes
1answer
442 views

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} ...
9
votes
1answer
417 views

In align environment, put word at left margin and still align equations with &?

In an align environment, how can I put a word such as "Now" or "And" at the left margin and still align equations on that line and subsequent lines with &?
9
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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 ...
9
votes
1answer
8k views

Error in align environment - runaway argument? [duplicate]

Possible Duplicate: Blank lines in align environment \documentclass[12pt,a4paper]{article} \usepackage[version=3]{mhchem} \usepackage{siunitx} \begin{document} \begin{align*} \ce{K_a} ...
9
votes
1answer
1k views

\overbrace split accross multiple lines

Is there a way to split the overbrace so that it appears in two halves over a multi-line equation. Something like /-----------Overbrace Label---- Equation over which to place ...
9
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1answer
173 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} ...
9
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3answers
275 views

Remember position of equal sign from one align environment to the next

As you know, the align-environment puts all positions marked with & (normally the equals sign) exactly beneath each other. I now want to save the position LaTeX calculates for & and use it ...
9
votes
1answer
8k views

Vertical space before and after align environment

I am wondering if it is possible in LaTeX to generally adjust the spacing before and after math in the align environment from amsmath. From the Mathmode-guide (by Herbert Voss) I gather that ...
9
votes
2answers
560 views

amsmath align within list

In the code below, the equation within the itemize environment is too wide for the page, but I don't get an overfull hbox warning (which I find annoying because it's sometimes useful to know exactly ...
9
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1answer
167 views

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 ...
8
votes
4answers
260 views

How to align five equations on three lines, e.g., 2-2-1, with the last equation centered?

I'm trying to use the alignat environment to arrange five equations on three lines as follows: two equations on the first line, two equations on the second line (aligned with those of the first ...
8
votes
4answers
2k views

How to align 'implies that' symbols neatly in equation array

The following is an equation array I have: \begin{eqnarray} \Rightarrow\eta_t &=& \eta_x(\omega \eta-(\varphi_x)_s) + (\varphi_y)_s\notag\\ \Rightarrow\eta_t\,(\varphi_y)_s &=& ...
8
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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 ...
8
votes
3answers
157 views

Aligning elements in set

How can I create a set with aligned elements? Example: I tried using align but it does not align as nicely as in the example. \begin{align*} &P = \set{ &A &\rightarrow &a | ...
8
votes
4answers
451 views

Alignment of table entries: the case of negative numbers

Assume that we have a table that has positive and negative entries. My question is simple: how can we have the number alignment to start from the actual number and not the negative (-) symbol? Let ...
8
votes
2answers
23k 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} ...
8
votes
4answers
295 views

How can I align at relation symbols within a cases environment?

I have used the following code in LaTeX - \documentclass{article} \usepackage{amssymb,amsmath} \begin{document} \begin{table}[H] \centering \begin{tabular}{c|c} \hline { $X=y+z$} & { ...
8
votes
2answers
383 views

Align the length of two nodes inside a matrix

I wanted to create a node with vertical and horizontal parts. So after some searching I found that I can achieve this by using a matrix. I tried the code below: \documentclass{article} ...
8
votes
2answers
471 views

Equation number with an apostrophe

I am writing two equations in an align environment: \begin{align} x^2+y^2=z^2, \\ x^2=7, \end{align} I would like the first equation to be labelled with e.g. (1.1) and the second equation to be ...
8
votes
3answers
14k views

Big \sum instead of small \sum in array environment

\begin{align*} \begin{array}{c} \min \: A = \min \: \sum_{i\in B} C_i \\ \ \min \: D = \min \: \sum_{i\in B} \pi_i \cdot F_i \end{array} \end{align*} How can I get i \in B below the \sum symbol ...
8
votes
3answers
128 views

long explanation in align environment; would like to split over two lines

I have an align environment as follows: \documentclass{article} \usepackage{amsmath} \newcommand\compose{\circ} \newcommand\bd{\mathbf{d}} \begin{document} \begin{align*} \sum_i [\int_M (\phi_i ...
8
votes
3answers
582 views

Typesetting a long exact sequence

I am trying to typeset the Mayer-Vietoris sequence (concisely - without the map names above the arrows). Currently I am simply using the AMS align environment with a bunch of \rightarrow, \cdots and a ...
8
votes
3answers
2k views

How to align piecewise functions?

I have two piecewise functions defined like this: \begin{align*} \left\{ \begin{array}{ll} i = x^2 + y^2 \\ j = a^2 + b^2 \\ \end{array} \right. \\ \left\{ ...
8
votes
2answers
159 views

DeclareMathOperator and align environment

Minimal working example: \documentclass{article} \usepackage{amsmath} \begin{document} \begin{align} &s + t &\text{foo}\\ &\sin x &\text{bar} \end{align} ...
8
votes
2answers
8k views

Horizontal spacing after equation

I have the following snipped in my LaTeX document: \begin{align} \sum_{j=1}^{m}x_{ij} &= 1 \text{ for } i = 1,2,...,n \sum_{i \in P_k}x_{ij} &\leq 1 \text{ for } j = 1,2,...,m \text{; } ...
8
votes
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 ...
8
votes
3answers
214 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
118 views

How to align only some equations in an align environment?

Here's what I got: \begin{align*} P[E_{m}] &= P[m] + P[2m] + P[3m] + \dots \\ &= \frac{1}{\varsigma(s)} \langle m^{-s} + (2m)^{-s} + (3m)^{-s} + \dots \rangle \\ &= \frac{1}{\varsigma(s)} ...
8
votes
4answers
2k 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)] &&= ...