Questions tagged [equations]

{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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25
votes
4answers
15k views

How to break a long expression in the denominator of a fraction?

I used the split command to break my equation but I receive the error: ! Missing } inserted. <inserted text> } l. \end {split} The code in .tex file is as follows: \begin{...
25
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3answers
17k 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*} ...
25
votes
2answers
12k views

Highlight an equation within an align environment

I would like to define a command that puts a red box around an equation with yellow highlighting. I have the basics working pretty well. What I am unable to figure out is: How to keep the alignment ...
25
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3answers
10k views

Alignment of equals sign in multiple align environments

I have multiple align environments in my document, separated by a small paragraph of text: \begin{align*} foo &= something very very long compared to the other align \end{align*} explanation ...
25
votes
1answer
21k 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 ...
25
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2answers
1k views

Unicode in the equations: pros and cons

Is there any pros and cons for using of Unicode (and vice versa) in LaTeX equations? Consider two examples: \lim_{h→0}∫_{x_0}^{x_0 + h}\frac{f(t)}{h} = f(x_0) x_0 ⇔ ∀ 𝜀 > 0, ∃ 𝛿 > 0,(|x-x_0|...
25
votes
2answers
19k views

Too much space at the top of a beamer block when using multilined math environment

I would like to place two math lines in a beamer block, as two separately centered lines. I know that I could do this using two distinct equation environments, but it would be nicer to use a single ...
25
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2answers
2k views

Is eqnarray really obsolete?

I just learned in eqnarray vs align that eqnarray should be avoided in general. Ok, so I started looking at my documents to get rid of it and (as suggested) use some environment of the amsmath package ...
25
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2answers
38k 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^...
24
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3answers
73k 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 ...
24
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3answers
48k views

Which one should I use: \begin{align} or \begin{aligned}?

Which one should I use: \begin{align} or \begin{aligned}?
24
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3answers
5k 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? ...
24
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3answers
55k views

How can I box multiple aligned equations?

This question is two-fold. In my document, I currently have boxes around single equations like so: \documentclass[11pt]{article} \usepackage{amsmath} \begin{document} \begin{equation} \setlength\...
24
votes
2answers
29k views

Highlight terms in equation mode

I am trying to add a green box around the first two terms in my equation (beta_0 and b_i). I also want to add a circle around the second term (b_i). Is it possible to do this in LaTeX? My code is ...
24
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1answer
18k views

Multiline \text in an equation

There are a number of possibilities to have multiline equations, but I am looking for multiline \text{...} elements. For example: \documentclass{article} \usepackage{amsmath} \begin{document} \...
24
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1answer
64k views

How to decrease space above and below displayed equations [duplicate]

This is my code. \documentclass{article} \usepackage{amssymb,amsmath,amsthm,enumitem} \begin{document} How can I decrease vertical space between text above and below \$\$ \ldots \$\$ ? $$x^{2}+y^{2} ...
24
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2answers
14k views

Reduce white space before and after multicols environment

I wonder how to reduce the vertical space before and after a multicols environment. I have something like below \begin{multicols}{3} { \begin{equation}\sum F_x = 0\end{equation} \begin{...
24
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1answer
4k 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 ...
24
votes
1answer
6k views

Flexible equation, align, multline environment

I'm looking for a command (say \foo{}) or pair of commands (say \foos, \fooe) that behave like: equation environment if there is no \\ nor & multline if there is a single \\ align if there are ...
23
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6answers
2k views

Is there a way to format the equation like this?

My friend is taking pre-calculus class, and I would like to create some notes for him. Is there a way I can do the following in latex? Right now I only have the very basic down. I want to make it ...
23
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11answers
2k views

What useful web services are out there?

Looking at this question, I wonder what good and useful web services are out there. For example the LaTeX symbol classifier looks interesting. You can draw a symbol with your mouse and get back the ...
23
votes
4answers
14k views

Making a new environment combining equation and split

I'm trying to define a new environment that consists of a split environment inside an equation environment. But I'm getting an error. Here's what I'm doing: \documentclass[a4paper,12pt]{article} \...
23
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4answers
33k views

Centering split equation

I am quite new to TeX. I want that each line in the following equation be centered, but I cannot find how to do it. \documentclass{article} \usepackage{amsmath} \begin{document} \begin{equation} \...
23
votes
4answers
91k views

How to draw the calculation of a determinant?

I'm trying to reproduce the following calculation of a determinant in latex: Any ideas? I thought of using the tabular environment but unfortunately I'm not able to align the "=" correctly.
23
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2answers
2k views

Why does no one fix eqnarray?

It seems to me that everyone agrees that no one should use the latex built-in eqnarray environment. So much so that packages have been made to fix it, and several alternatives have been made, ie. ...
23
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5answers
4k views

Multicol layout for systems of (linear) equations

How can a similar arrangement be archived (with ams*, aligned, multicol, etc) 1.2.3 Solve the following system of equations: a) x - 2y - 4z = 1 b) -23x + 43y = 22 3x - ...
23
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1answer
17k 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 ...
23
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2answers
12k views

Is there a difference between the `displaymath` and `equation*` environments?

The amsmath documentation says Basic LaTeX doesn’t provide an equation* environment, but rather a functionally equivalent environment named displaymath. Are they really the same or is there a ...
23
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2answers
4k views

Table of Equations

I've looked around for this, and haven't been able to find a satisfactory answer; How would one go about producing (automatically) a table of equations, just a numbered list of used equations, ...
22
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2answers
56k views

How can you number equations manually?

How to number equations manually? I'm making a presentation on a chapter, so would like my equations to be numbered as in the book, and not necessarily from the first equation in the chapter, for ...
22
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4answers
2k views

Graphics equations: put text on equations

I have a big question that I cannot solve by myself. I would like to add text on my equations, but I like to have some graphics on those. For instance, I would like to explain why I am doing ...
22
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2answers
5k views

Colored underbraces for annotating equations

I am trying to implement my previous Powerpoint presentation in beamer. I have a figure like I want to create something like this in beamer. I wrote a equation as follows but I couldn't write the ...
22
votes
7answers
16k 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 ...
22
votes
5answers
8k views

Giving an equation between \[ \]'s a number

I usually use \[ ... \] to typeset equations in latex and sometimes I come back and realize that I want to have an equation number and label. I have been coming back and editing it to \begin{equation} ...
22
votes
1answer
12k 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}\...
22
votes
1answer
353 views

Does \\ in the last line of an array have any effect?

Consider the following example: \begin{array}{l} line 1 \\ line 2 \\ \end{array} Is the \\ in the last line completely optional or are there circumstances under which it has any effect?
22
votes
1answer
48k 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 ...
21
votes
4answers
146k views

Bold text and newlines inside equations

What I'm doing: \usepackage{amsmath} \usepackage{amsthm} \usepackage{eucal} \usepackage{amssymb} \usepackage{mathrsfs} % don't know what some of those do, but i think all the math related ones are % ...
21
votes
3answers
15k 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 ...
21
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3answers
7k 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?
21
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1answer
9k views

Blank lines in align environment

Is there a way to insert a blank line between two equations in align environment? From what I understand a blank line is interpreted as \par and \par is not allowed in align. Can I disable this "...
20
votes
4answers
4k 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}...
20
votes
4answers
43k views

Customize equation numbering for Equation environment?

I want to manually label equation number ? For example I want to label this equation 3.1 instead of (1) which automatically pops up. Is it also possible in split environment as well or not ? \...
20
votes
2answers
7k views

Labelled in-line equation

I searched the internet but I cant find a solution for my problem. I want a numbered and labelled equation inside the text.Something like: The equation a+1=b (2.1) does ... The equation a+1=b ...
20
votes
6answers
17k 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 ...
20
votes
3answers
26k views

Putting equations in \intertext to annotate a proof

I'm trying to typeset a proof with Latex. When I do proofs, I like to alternate between a line of text, to explain each step, and the resulting equation. I also like to have the equations align at the ...
20
votes
2answers
714 views

Equation numbers in outer margins on a two-sided document

I'm looking for a two-sided extension to the solution for this question: Put equation numbers in the sidemargin with Tufte-Latex class This post seems relevant: Equation tag in twoside-mode outer ...
20
votes
1answer
29k views

Beamer - Uncover within Equation Mode

I have an equation and I would like to uncover part of it at a time. Take y = 2x + 3. \begin{equation*} y = 2x + 3 \end{equation*} I would like to uncover the 3 \begin{equation*} y = 2x + \uncover&...
19
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3answers
50k views

LaTeX locally change equation numbering

I want my document to look like this: Normal document text. equation (1) Definition Definition text. equation (D1) More definition text. Normal document ...
19
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3answers
2k 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 ...

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