{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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3
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1answer
2k views

“!Missing $ inserted” error using amsmath environments

I am trying to compile a document with equations but whenever I use \begin{eqnarray}..\end{eqnarray} or \begin{align}...\end{align} or anything like this I get the error msg !Missing $ ...
35
votes
11answers
5k views

Embedding LaTeX equations into a webpage

I'd like to include some basic math equations into a webpage. Is there an easy way of either compiling the LaTeX into an image which I can upload, or else of having the browser parse the code?
50
votes
2answers
9k views

Two letter variable names

In math mode, TeX assumes "hidden multiplication" (so that two variable names put nearby have invisible multiplication between), so that, AFAICT, expressions like $ABC$ are rendered with small ...
23
votes
5answers
3k 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 - ...
17
votes
1answer
9k views

How can I add left aligned text to an equation?

I have a document I am trying to copy to learn TeX. Here is what I have encountered: How can I have the "or" in the equation. This is what I have right now: \[ f = ma; \] But $a$ is the change in ...
12
votes
2answers
22k views

How to link an equation in LaTeX

I am wondering how I can link an equation in LaTeX, I mean when I click on the link then I'll be directed to that specific equation.
17
votes
2answers
514 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 ...
8
votes
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. ...
16
votes
1answer
5k 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 ...
10
votes
2answers
6k 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} ...
14
votes
3answers
16k views

How to write a function (piecewise) with bracket outside?

How to write this Piecewise function using LaTeX? I tried $ \begin{array}{cc} \{ & \begin{array}{cc} 0 & x\leq 0 \\ \frac{100-x}{100} & 0\leq x\leq 100 \\ 0 ...
8
votes
3answers
10k views

List of Equations / Table of Equations

After finding Table of Equations and http://www.latex-community.org/forum/viewtopic.php?f=5&t=428, I set about making a List of Equations for my document. The catch here is that we already have a ...
5
votes
2answers
214 views

equation with arrows

My intention is to create equation which looks similar to one of examples below (I prefer the second one). There should be an arrow from JKL to DEF and GHI and from GHI to DEF. Neither alignment ...
4
votes
1answer
504 views

Left-hand vertical rule applied to flalign environment with automatic pagebreak

I am referring to the coderule environment (see Override \centering to left justify an image) presented earlier by @TH as answer to the following question: Override \centering to left justify an image ...
13
votes
2answers
5k 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. ...
9
votes
4answers
8k 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 ...
7
votes
2answers
2k views

Simple Beamer Template for Total Beginners

Is there a template that allows me to create slides with only some simple formulas at most?
0
votes
2answers
604 views

\begin{equation}: “Display math should end with $$” error?

I'm pretty new to LaTeX, completely new actually, and there is one thing I can't quite understand. I get the error "Display math should end with $$" when writing an equation like this: ...
12
votes
1answer
3k 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 ...
11
votes
2answers
2k 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: ...
7
votes
1answer
161 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 ...
6
votes
1answer
1k views

Displaying an equation in a list

How could one get a displayed equation inside a list environment, say itemize, so that the equation is both centered horizontally and on the same line as the bullet, but with the bullet still on the ...
22
votes
2answers
2k 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, ...
13
votes
4answers
327 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 ...
20
votes
2answers
2k views

Typesetting Right-to-Left math

UPDATE: I've managed to produce something that is aesthetically correct, however with a lot of "hardcoding" and trial and error to manually measure my spaces. Not to mention that I have to write my ...
14
votes
3answers
1k 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 ...
17
votes
3answers
13k views

Aligned equations in LaTeX

I have a long equation in LaTeX, which I need to break up into more lines. I've done this, although its not quite what I was looking for. Here is a MWE showing my problem: ...
12
votes
2answers
5k 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 ...
7
votes
1answer
2k views

Punctuation in equations

My document will contain a lot of equations, and as usual in that case I would like to use "punctuation" in the equations, like commas, colons, periods/full stops, semicolons, etc. Is there a special ...
17
votes
6answers
4k views

Multiline equation with LHS alone on first line?

I would like my multiline equations to look like this: Left-hand-side of my equation = right-hand-side number 1 = right-hand-side number 2 = etc. I know there is a simple way to do ...
14
votes
3answers
3k 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?
13
votes
4answers
4k views

Intertext vertical spacing

How do I reduce the vertical spacing of \intertext?
11
votes
3answers
6k 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*} ...
6
votes
2answers
5k 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 ...
5
votes
2answers
554 views

hf-tikz doesn't box around equation

In TikZ based \boxed construct is causing pdflatex to hang it was suggested to use hf-tikz instead of manually using tikz. The documentation indicates that this package doesn't work properly for tall ...
14
votes
2answers
702 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} ...
12
votes
3answers
703 views

Replace the `$$ … $$` macro with the `\[ … \]` macros? - Prefer the way LaTeX lays it out, but `$` are faster to write

Is there a way to replace the $$ ... $$ macro with the \[ ... \] macros? (and replace inline mathmode as well) I realised the only way I can write the \sum_{i=1}^{10} t_i is between the \[ ... \] ...
11
votes
1answer
340 views

Which packages/practices are relevant for writing Structured Derivations? (similar to Dijkstra's calculational style of proofs)

Does anyone know of any packages that support this style of writing proofs? The only things that I've found are: tex-ewd, a bunch of plain TeX macros on CTAN written specifically with Dijkstra in ...
10
votes
2answers
655 views

Custom alignment of columns in align environment

I need to typeset two columns of equations, each row typeset with an equation number to the right as with an ordinary equation. The first column must be centered, and the second column must be ...
10
votes
3answers
3k 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 ...
4
votes
1answer
4k views

Numbering equations with LyX

I am using LyX with layout report for my thesis. I would like to have numbering on my equations but dont know how to do it. I'd like the first number to show the chapter and the second one the number ...
4
votes
2answers
988 views

Is it possible to re-insert a LaTeX equation by label?

Is it possible to re-insert an equation in LaTeX via referencing the original equation by label? I already know, it is possible to: reuse the original equation numbering via \tag{} as described here ...
11
votes
2answers
232 views

Equation number enclosing parentheses misplaced with Polyglossia+Hebrew+amsmath

I am compiling the following MWE using XeLatex within TeXnicCenter and get a garbled equation number: \documentclass{article} \usepackage{amsmath} \usepackage{polyglossia} \setmainlanguage{hebrew} ...
6
votes
3answers
2k views

Left-aligned text inside an equation

Inside an equation-like environment, I'd like to have some text that is aligned to the left margin of the text block, something like \intertext, but in the same line as the equation Something like ...
6
votes
2answers
3k views

Writing steps in an equation

What is the "best LaTeX practices" for writing equations with multiple steps? Feel free to recommend packages that might help. Do these methods work just as well within an enumeration? Here is what ...
6
votes
3answers
415 views

Uneven vertical spacing displaymath

I would like to ask you why we have uneven vertical skips between the first two and last two vectors, coming from the source: \documentclass{article} \begin{document} \[(a,b,c,d,e,f,g,h)\] ...
5
votes
1answer
22k views

using subequations

I have an equation consisting of two parts and would like to use subequation for that. Here's the code: \usepackage{amsmath} \begin{subequations} \begin{equation} \operatorname{min}_{a,b,c} ...
3
votes
1answer
181 views

How to put a text label *before* an equation?

currently I have an optimization problem defined in {equation} environment: I want to add a label (P) before equation (6). Currently, I had to use the first line "Optimization problem (P)" as a ...
3
votes
3answers
3k views

Numbering side-by-side equations or inline equations

I am trying to produce a two-column table of math equations, where each cell contains its own left-justified, numbered equation. I tried using \begin{equation} \end{equation} inside the tabular ...
2
votes
1answer
822 views

Align number from enumerate with equation

I'm trying to have an equation as the first line of one of my items in an enumerate environment. Example: \begin{enumerate} \item \[ x \] \end{enumerate} I want the $x$ to have the same ...