{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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3answers
11k 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 ...
10
votes
4answers
528 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
votes
2answers
193 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 ...
10
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2answers
3k 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} ... \\ ...
10
votes
1answer
12k 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 ...
10
votes
1answer
316 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
1answer
11k views

aligning split equation

I am new to Latex ;) I split my equation like this: \begin{equation} \begin{split} \tilde{m}=P\tilde{M} \\ \quad = K(R^1R^2R^3t) \begin{pmatrix} X \\ Y \\ 0 \\ 1 \end{pmatrix} \\ \quad= ...
10
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1answer
1k views

How to organize labels when there are too many equations?

I'm writing a moderately long text using LaTeX, and it's great to be able to organize chapters, sections, appendices, and everything else almost automatically. One thing has been bothering me though. ...
10
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1answer
791 views

align also ylabels in a TikZ matrix

I am aligning many pgfplots with the TikZ \matrix. The axes are automatically aligned correctly. How can I also align the ylabels automatically (because I am changing plotted data very often)? ...
10
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1answer
544 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} ...
10
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1answer
1k 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} ...
10
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2answers
4k views

How to position text on top of a node?

How to position text on top of a node? \documentclass{report} \usepackage{tikz} \usetikzlibrary{positioning} \begin{document} \tikzset{every node/.style={rounded corners,minimum height=5cm}} ...
10
votes
2answers
829 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 ...
10
votes
1answer
441 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 $z$. ...
10
votes
2answers
4k views

How to reduce hspace between columns in align environment

With the following MWE, I have 2 columns: \documentclass[12pt, a4paper]{scrartcl} \usepackage{amsmath} \begin{document} \begin{align*} 4 &= 4 && \text{yes}\\ 0 &= 0 && ...
10
votes
2answers
167 views

Edit marginpar command through whole document

I'm finding myself doing the following on every margin paragraph: \marginpar{\raggedright \scriptsize <content here>} Is there a way to set the align and script size for every margin ...
10
votes
2answers
573 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
votes
2answers
500 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 ...
10
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1answer
181 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 ...
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
votes
4answers
556 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
298 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
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2answers
34k 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} ...
9
votes
3answers
787 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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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
954 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 ...
9
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4answers
401 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
votes
3answers
167 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
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)] &&= ...
9
votes
3answers
6k 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
votes
3answers
16k views

Centering in the \align* environment

I'm using the \align* environment from the amsmath package. How can I center one of the lines inside the environment? In the following example, I want to the \vdots to be centered, instead of ...
9
votes
2answers
7k 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 ...
9
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2answers
6k 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
492 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
votes
2answers
218 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
2answers
11k views

align inside of tabular

Today I failed using an align-environment inside of a tabular-environment. Consider the following example: \documentclass[12pt]{scrbook} \usepackage[english]{babel} \usepackage[utf8]{inputenc} ...
9
votes
1answer
666 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 ...
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
1answer
444 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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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
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 ...
9
votes
1answer
201 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
votes
1answer
9k 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
3answers
300 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
154 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} ...
9
votes
2answers
569 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 ...
8
votes
2answers
486 views

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? ...
8
votes
4answers
267 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
2answers
370 views

How to make curly braces with several equations?

I am trying to type the following equations in LaTeX: What I currently have is: \documentclass{article} \usepackage{amsmath} \begin{document} \begin{align*} \left.\begin{aligned} ...
8
votes
4answers
3k 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 &=& ...