{equations} is about the various environments to typeset displaystyle mathematics, e.g. equation and {align}. For general questions about mathematical typesetting use {math-mode}. Both tags are possible on the same question.

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17
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6answers
7k views

Align two inequalities

I am trying to align two inequlities vertically. The \le signs should have the same horizontal positions and the term in the should be centered. My first attempt: \begin{align*} \sum a &\le \sum ...
17
votes
1answer
10k views

How to reference equations using letters and numbers

Sometimes it is convenient to refer to a group of equations by a letter and a number. For example: 2+1 (A1) 2+4 (A2) x^4 (B3) x^e (B4) Placing \tag{A\theequation}\label{eqn:thisone}\...
17
votes
3answers
5k views

Can I insert an image into an equation?

I would like to use a small image in an equation, where a symbol like \alpha might otherwise be. Is there a nice way to do this?
17
votes
1answer
106k 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 , K=k)...
17
votes
2answers
40k views

Using “cases” inside “equation” gives error[with “amsmath” loaded]

I'm trying to use the cases environment inside an equation environment. The sample code is quite simple: \begin{equation*} X(\omega) = \begin{cases} 1 \text{se $\omega ...
17
votes
2answers
10k views

Adding line numbers to latex and respecting equations

It's often convenient to add line numbers to a page automatically and the lineno package generally does the trick. But I've had two problems with it It doesn't seem to align the line numbers with ...
17
votes
2answers
867 views

How do I discard a portion of an equation number when cross-referencing?

I am writing a LaTeX document in which I number equations within sections. Thus, in my preamble I have \makeatletter \@addtoreset {equation}{section} \renewcommand{\theequation}{\thesection.\...
16
votes
4answers
2k views

Good typesetting practice for long equations

I have the following (quite horrible) equation in my thesis: \begin{align*} \frac{\partial^2}{\partial t_1^2} f(t_0,t_1) = ( \delta+2t_0+2t_1)^{\alpha( w-t_0+t_1 )-1} \cdot \bigl( \frac{\partial^2}...
16
votes
2answers
18k views

Linebreak between \left and \right [duplicate]

Possible Duplicate: How to make \left, \right pairs of delimiter work over multiple lines? I would like to type something like this: \begin{equation} \begin{split} \left( ba ba ba \\ ...
16
votes
3answers
831 views

align vs. equation: Which way is typograpically preferred?

The main differences between align and equation are the spaces and that align cannot be used with split, as far as I know. What would be, from a typographic point of view, the preferred practice? ...
16
votes
1answer
62k views

Left brace including several lines in eqnarray [duplicate]

How is it possible to make a brace and have something like this in a eqnarray block?
16
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1answer
4k views

Using braces to label parts of an equation

Given an equation, say Bayes' rule, $P(X \mid O) \propto P(X)P(O \mid X)$ how do I label the different parts of the equation using curly braces?
16
votes
2answers
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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
2answers
18k views

Multiple subequation labels in one \ref

I'm trying to write a macro that puts subequations' labels in parentheses in a compact form. For example, if I have \begin{subequations} \begin{align} y - ax &= b \label{subeq1}\\ x^2 + y^...
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 ...
16
votes
2answers
1k views

Suppress equation number when not refered to [duplicate]

Is is possible to use only equation or align environments without the * and then automatically suppress the equation number if there is nothing refering to that equation? It would make the LaTeX-life ...
15
votes
3answers
2k views

How can I illustrate decimal to binary conversion?

As part of my homework for discrete math I need to convert different decimal values, both positive and negative, to 8-bit binary representations using signed magnitude, 1's complement, and 2's ...
15
votes
6answers
609 views

How do I produce an equation of mostly text that is not too long for the page?

So what I want is an equation something like the following: Volume of diluted cell suspension or number of Petri dishes = volume of undiluted X density of undiluted ...
15
votes
3answers
7k views

How to Make Theorems and Equations Share Numbering

How do I make theorems and equations share numbering? The default numbering system goes like this: Theorem 1. Blah blah blah... 1=0+1 (1) Theorem 2. More blahs... Theorem 3. No more ...
15
votes
2answers
43k 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} \mathcal{L}^...
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
2answers
795 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
18k views

Use of \small in the equation environment

My equations are a little too large for the normal eqnarray environment, so I've been using the \small delimiters around the \begin{eqnarray} ... \end{eqnarray}. Unfortunately, this causes the the ...
15
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]{...
15
votes
2answers
343 views

Extra space added after equation when it is coloured

For some reason space is added after my equation when I colour it. This does not happen if the colour is added to text. Is there a simple way to prevent this from happening, like a global setting (I ...
15
votes
2answers
2k views

Custom pagebreak in align equation

I got the following problem: Right now I am checking my equations, which are usually written in align. This looks great in most of the cases, but sometimes the pagebreaks are weird, ie there is a lot ...
15
votes
2answers
4k 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 ...
15
votes
2answers
1k views

How do I show the equation formula again instead of its number of ref?

I have an equation: \begin{equation}\label{eq:equation} f(x)=x \end{equation} I would like to refer to this equation and show the whole formula again, and not only its number. In other words, I ...
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
3answers
27k views

Make equations large

I'm including some equations in my document, but want them to appear very large. I have them in display mode, as opposed to inline mode, but can't seem to find any way to make them larger. I've tried ...
14
votes
3answers
31k views

Two sets of aligned equations in two columns?

Say I have a set of equations: (1) \begin{align} wx&=u\\ wy&=v\\ w&=10 \end{align} (2) \begin{align} x&=u/w\\ y&=v/w\\ \end{align} How can I do the following: put (1) and (2)...
14
votes
9answers
853 views

Looking for a more appropriate version of \cases

Often-times I find myself wanting to write something like, That is, a vertical brace followed by a table consisting of three columns, the first and the last are math, aligned where-ever I like, and ...
14
votes
6answers
424 views

How to align the term to right

\documentclass[a4paper,titlepage]{article} \usepackage{amsmath,amssymb} \newcommand*{\PartialConj}{\ensuremath{\bar{\partial}}} \newcommand*{\Abs}[1]{\ensuremath{\left\lvert #1\right\rvert}} \begin{...
14
votes
5answers
750 views

How to split a long formula and make it beautiful?

My method: \documentclass[UTF8]{ctexart} \usepackage{amsmath} \usepackage{amssymb} \usepackage{graphicx} \usepackage{epstopdf} \usepackage{inputenc} \begin{document} \begin{equation} \begin{split} \...
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
5answers
8k views

Diagonal strikeout starting too low and ending too high

I want to strikeout an equation with diagonal line but I've not managed to get the diagonal line to draw as I want. The closest I've gotten is via the first example in Frédéric's answer of \cancel ...
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,...
14
votes
2answers
4k views

Image next to Equation

I am trying to make my first LaTeX file and have been reading syntax for a bit and have not been able to figure one thing out yet and don't seem to find anything about it online so I thought I might ...
14
votes
1answer
15k views

Double square brackets

In many equation editors (e.g. MS Word 2007 and Daum Equation Editor), there's a double square bracket. Is there a TeX equivalent for [[, ((, )), and ]]?
14
votes
1answer
40k views

Multiline equation without number

I am trying to have a multiline equation without any numbering, even not in the last one. \begin{align} a = x \nonumber \\ b = y \end{align} However, this is producing a line number in the last ...
14
votes
1answer
8k views

How can I position equation numbers always to the left side?

Equations and amsmath environments put equation numbers to the right side by default, the output of \begin{multline} some equation \end{multline} is: equation (number) How can I change it this ...
14
votes
1answer
7k views

How can I have a bigger integral (\int) delimiter?

I'm writing some integrals and I don't like the way the \int symbol is displayed when it is followed by a big delimiter. Here's the code: \[ \int_S\biggl(\nabla\times\bar B - \mu_0\bar J - \mu_0\...
14
votes
2answers
2k views

Center over-long equations between both margins

I understand the reasoning behind the fairly narrow textwidth in a default LaTeX article. 60-80 characters per line and all that. However, I am preparing a document that features many lengthy ...
14
votes
1answer
947 views

Put equation numbers in the sidemargin with Tufte-Latex class

In Tufte-Latex all captions etc. are in the side margin. I want to put the equation numbers there as well. Is it possible to do this?
14
votes
2answers
6k views

How can I center text/math inside a list environment?

When using math (display) mode in conjunction with a list environment, the displayed material is not truly centered on the page; it is only centered with respect to the indentation of the item. ...
14
votes
2answers
1k views

Is it possible to have a “real” \belowdisplayshortskip?

I think this is a tough one. Have you ever wondered why TeX sometimes produces vertical spacing around equations that is far from satisfactory? An example: \documentclass{article} \setlength{\...
14
votes
2answers
2k views

What's the difference between split and aligned?

I don't understand the difference between the split and aligned environments introduced by amsmath, so I'm posting this question as a place to collect what subtle details there may be. One thing ...
13
votes
5answers
3k views

Help me to write Long LaTeX equations fast with colours and possibly with other aids

I am too slow LaTeX-typist, for example with the equations below I cannot find where I am missing some bracket. Could someone offer me some computational method? I use Vim but I am happy with any ...
13
votes
3answers
46k views

How can I decrease spaces between equations?

\documentclass[12pt,a4paper]{mwrep} \renewcommand\baselinestretch{1.5} \begin{document} \chapter{Test} Text text text text text text text text text text \begin{equation} 1 + 2 + 3 = 6 \end{...
13
votes
2answers
2k views

What does ampersand equals mean?

On the wikipedia page: http://en.wikipedia.org/wiki/LaTeX, the first example is \begin{align} E &= mc^2 \\ m &= \frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}} \end{align} ...