{amsmath} is a package provided by AMS that enhances LaTeX's mathematical typesetting capabilities in various ways.

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20
votes
3answers
318 views

How to get the cases brace to be a link

I copied the cases code form amsmath.sty and tried to wrap the \lbrace within a macro and added a \left. to get this to compile. This of course loses the size info so the brace is not the correct ...
20
votes
1answer
3k views

Changing the appearance of equation numbers with amsmath

For equations in my document, I use the facilities of the amsmath package. In order to make the equation numbers more eye-catching, I want them to be in boldface and a little bit indented to the ...
19
votes
2answers
14k views

Normal subgroups

To typeset that H is a normal subgroup of G, I would use H\unlhd G. However, the result doesn't satisfy myself, since the G seems too close to the triangle: Adding a space \ makes "too much space"...
19
votes
2answers
4k views

How do I do a one-shot MathOperator?

The amsmath packages helpfully define a macro \DeclareMathOperator which does what it says on the tin: it declares a mathematical operator such as \sin or \Null or whatever and typesets it all nice ...
19
votes
2answers
503 views

amsmath matrix vs loading the array package

Here is an interesting interaction. Consider the example below. Whenever the array package is loaded, extra space appears on the right in the output. Any ideas as to why? \documentclass[a4paper]{...
19
votes
1answer
1k views

Why is \global\let not always global?

As an LaTeX environment opens a local group, it is normally necessary to use a global definition if changes in the environment should be available after the environment: \documentclass{minimal} \...
19
votes
1answer
25k views

Text over/under implies arrow?

I'm currently trying to write over/under an implies arrow in LaTeX (in math mode): \implies_{text} This places the text lower, but next to the arrow, not below it. How can I get it below the arrow?...
18
votes
4answers
1k views

How to typeset an i with asterisk above?

I tried it with a modification of \overset as suggested by Werner in this question: Creating non-math mode substitutes for \overset and \underset not dependent on the amsmath package With the new ...
18
votes
4answers
1k views

What to do with this hyperref note on amsmath?

http://www.ctan.org/tex-archive/macros/latex/contrib/hyperref/ has this note copied below: amsmath ------------- The environments equation and eqnarray are not supported too well. For ...
18
votes
3answers
10k views

Big forward slash in math

I have a equation in from of a=VERYBIGSTUFF / VERYBIGSTUFF And I would like to have a "verybig" forward slash in the middle of them. I dont like \frac mode, as I would like to have them left-to-...
18
votes
2answers
7k views

How to fix this amsmath warning about redefining \vec

I am using the pss(b) template, which starts with, \documentclass[pss]{wiley2sp} % provides pss two-column style \usepackage{amsmath} %\usepackage{bm} % uncomment these two packages if ...
18
votes
2answers
453 views

Example in which `$$…$$` gets wrong spacing

The use of \[...\] vs. $$...$$ is discussed in Why is \[ ... \] preferable to $$ ... $$? and What are the differences between $$, \[, align, equation and displaymath?. It seems like \[...\] has ...
17
votes
3answers
5k views

Multiple letters without spacing in Math [duplicate]

Is there something I can add to the preamble of my document such that multiple letters without spacing in a Math environment (such as $NP$) do not have extra spacing between them and are not ...
17
votes
5answers
2k views

Underbrace under sqrt content

I am trying to use underbrace to clarify the arguments to a sqrt. However this causes the square root sign to reach all the way down to the bottom of the text under the brace(s), which is not what I ...
17
votes
4answers
7k views

Intertext vertical spacing

How do I reduce the vertical spacing of \intertext?
17
votes
3answers
1k views

Create \eqref* (\eqref without link, i.e. starred eqref)

I want to create a command \eqref*, which is the same like \eqref, but without a clickable link. There are similar commands for \ref (\ref*) and \autoref (\autoref*) which achieve this behaviour, but ...
17
votes
1answer
17k views

amsmath align environment: row spacing

How can I stretch the spacing between consecutive lines in an align* environment? I have a few lines with \fracs in which both the numerator and the denominator consist of textual phrases, not math ...
17
votes
3answers
4k views

Long Dashed Right Arrow

Is there a \dashrightarrow equivalent of: \xrightarrow{\hspace*{4mm}} or \longrightarrow or a similar way to fudge it?
17
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3answers
3k views

What is the mandatory argument of alignedat for?

alignedat has a mandatory argument. But Herbert (in his mathmode.pdf) wrote as follows, I have made a trial and error, I noticed that the largest number that can be passed is 1073741823 and no ...
17
votes
4answers
22k views

Diagonal dots spanning multiple lines/columns of a matrix

I'm filling in large sparse matrices, for example \begin{bmatrix} 0 & -2 & 1 & & -1 & 2 \\ 2 & \ddots & \ddots & \ddots & & -1 \\ ...
16
votes
3answers
48k views

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} \...
16
votes
6answers
33k views

\qed for theorems without proofs

It is common to place a \qed-Box at the end of a theorem statement (or lemma, corollary, ...) if we give no proof for that statement. How can I do this in LaTeX? If I place a qed-box at the end of ...
16
votes
7answers
2k 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 ...
16
votes
2answers
3k views

Extendible equals sign

I have a command that has been floating around in my standard preamble for a while: \newcommand{\xeq}[1]{\stackrel{\;#1}{\cleaders\hbox{=\!}\hfill}\:} It is meant to mimic the AMS-LaTeX extendible ...
16
votes
2answers
9k views

A medium dot in math mode

Is there a nice way to produce a medium-sized dot to use in a formula like this: $x_{i\cdot} = \sum_{j} x_{ij}$ The \cdot is not very visible.
16
votes
2answers
56k views

How do you make numbered equations in latex?

I would like to put in a code that automatically assigns a number to the equations in my documents preferably aligned on the right hand side. How can I go about this? \documentclass[a4paper,11pt]{...
16
votes
2answers
16k views

How to put the QED symbol of a proof at the right place inside align?

When a proof ends with a formula in equation or equation* environment, putting \qedhere after the equation would cause the QED symbol to appear in the right place. I.e. at the end of the line in which ...
16
votes
1answer
10k views

Span formula over multiple pages.

I've looked through the search but I couldn't find what I specifically want. I have the following \begin{equation} \begin{split} Very long equation \end{split} \end{equation} Now, I have half a ...
15
votes
4answers
2k views

mathop shifts the baseline, DeclareMathOperator doesn't

Here is a little example that illustrates this strange behaviour: \documentclass{article} \usepackage{amsmath} \DeclareMathOperator\foo{\mathbf{l}} \begin{document} baseline$\mathbf{l}$baseline$\...
15
votes
3answers
531 views

Typesetting the square of a mathematical operator

Assume I want to typeset the square of some mathematical operator A. Using \operatorname (amsmath package), there are basically two ways to do that: \(\operatorname{A^{2}}\) (i.e., the exponent is ...
15
votes
3answers
10k views

How to increase the spacing between equations in “gather”?

Is there a way to consistently increase the vertical spacing between equation lines in a gather (or gather*) environment from amsmath? Specifically, I want to produce something like \begin{gather*} ...
15
votes
5answers
5k 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 ...
15
votes
1answer
5k 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 ...
15
votes
2answers
6k views

Split-like environment inside cases environment

I'd like to have a cases environment with some cases that are too long to fit on one line. I tried this: \begin{cases} \begin{split} long expression \\ second line of long expression \end{...
15
votes
2answers
798 views

How to remove an unwanted white space at the last end of a horizontal curly brace?

You can see there is an unwanted white space at the last term below. \documentclass[border=12pt]{standalone} \usepackage{amsmath} \begin{document} $ \lefteqn{\textstyle\overbrace{\phantom{1+2+3+4}}^...
15
votes
2answers
5k 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 \intertext{...
15
votes
1answer
943 views

What causes this strange interaction between glossaries and amsmath?

MWE: greatly trimmed from a large document; XeLaTeX; full TeXLive2012 completely up-to-date: \documentclass{memoir} \usepackage{fixltx2e} \usepackage{amsmath} \usepackage{mathspec} \usepackage{...
15
votes
2answers
418 views

Strange behaviour of binomial coefficient's delimiters

This question led to a new package: fixcmex While writing down my Combinatorics exercises I found that the binomial coefficient's delimiters weren't displayed as indicated inside the amsmath ...
15
votes
1answer
8k views

Using `\allowdisplaybreaks` locally for a single chapter / single equation

I do have a longer paper. In one chapter I got several multiline equations, which I wrote using the align environment from amsmath-package. Actually those are quite long computations which should ...
15
votes
1answer
334 views

\dots plus \left

I have the following MNWE and don't understand why this fails. \documentclass{article} \usepackage{amsmath} \begin{document} $\dots \left. \right.$ \end{document} Understanding the relevant code ...
15
votes
1answer
611 views

amsmath is now latex-amsmath: what does this mean for me?

I saw in the latest updates to CTAN that the amsmath package is now called latex-amsmath. What effects is this change going to make for me? Am I going to have to \usepackage{latex-amsmath} in the ...
15
votes
1answer
682 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 to:...
15
votes
2answers
508 views

Why must \DeclareMathOperator be in the preamble?

What is the rationale for requiring \DeclareMathOperator to be in the preamble? Why are users not allowed to restrict the scope of an operator definition to a particular chapter or environment, like \...
15
votes
4answers
1k views

Hyperref jumps to the wrong equation if the equation has a \tag and cleveref is used

The problem I'm writing a document where all of my equations are labeled, not by numbers, but by names, which I provide with amsmath's \tag command. I also use cleveref for ease of cross-referencing....
15
votes
1answer
862 views

How does this macro for augmented matrices work?

I've used this code I found somewhere to typeset literally hundreds of augmented matrices, and it's been amazing: \documentclass[a4paper,12pt]{article} \usepackage{amsmath} \usepackage{arydshln} \...
15
votes
3answers
9k 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 ...
14
votes
5answers
6k views

Typesetting math: an optimisation problem (cost & constraints)

I really struggle to align a system of equation for an optimisation problem. It was all ok at the beginning until I started adding the constraint. I've got this code so far: \documentclass{article} \...
14
votes
4answers
721 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} & = \text{...
14
votes
2answers
13k views

Difference between (split, align) and (gather, aligned)?

Here is an MWE which shows that they seem to do the same thing. Is there any reason to prefer one over the other for typesetting groups of equations? I would prefer the align syntax because it allows ...
14
votes
2answers
5k 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: \documentclass[12pt,oneside,...