{math-mode} is about typesetting mathematical content, e.g. tweaking the appearance of spacing and symbols in a formula, or producing specific mathematical constructs. For questions about "wrapper" environments like equation or align, consider the tag {equations}.

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Is \mathrm really preferable to \text? [duplicate]

It seems to be the de facto standard to use \mathrm for upright letter notation in math mode as opposed to \text. Would it not be better to use \text in general? One particular problem I am thinking ...
21
votes
1answer
22k views

Square brackets in math mode without the bracket symbols

Is there a way to typeset a square bracket without using the symbols [ and ]? What I am looking for is like \vert instead of |. Motivation is a need for a workaround in using LaTeX formulas inside ...
20
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3answers
10k views

How to put a brace on the right, not left, to group cases?

How can I get a brace on the right, not the left, to group cases, using cases? (I know actual cases look better with the brace on the left, but the items I need to group are not literally cases. They ...
20
votes
3answers
332 views

Why does \[…\] do the wrong thing at the top of a page?

Upon reading What are the differences between $$, [, align, equation and displaymath?, I decided I really wanted to understand what was going on inside \[...\] and so I devised some tests. What I ...
20
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3answers
15k views

Math mode in tabular without having to use $…$ everywhere

\begin{tabular}{|l|l|l|} \hline Column A & Column B \\ \begin{math} x & y \\ \end{math} \end{tabular} This won't let me compile and gives a lot of errors, how do I enable math mode in a ...
20
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2answers
10k views

how to select math font in document

I want to show in one document different font examples of math fonts, for example Latin Modern, Times and Charter. I know the command \usefont{T1}{lmr}{m}{n}, but have no idea how to combine that ...
20
votes
2answers
10k views

Non italic math mode symbols?

I would like to insert a \mu command to form $\mu$ m (micro meters) i.e. as a unit, not a variable. This means I do not want \mu to be italic. However, LaTeX only accepts the \mu command in math-mode ...
20
votes
4answers
2k views

Underscore in textmode vs mathmode

I use _ character often in text mode, so I changed category of underscore: \catcode\_=12, but that applies also to mathmode and now I'm unable to make subscripts with underscore in mathmode. Is there ...
20
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2answers
5k views

\overbrace with square bracket

I'm trying to put a nice square bracket over a complex text, it should look like an \overline but with ending like \ulcorner and \urcorner. The presence of \overrightarrow and \overleftarrow makes me ...
20
votes
3answers
436 views

Create a new math mode

Motivation When I use math mode inside of itemize environments for multiline equations, I have to do something like the following ... \begin{itemize} \item $\begin{aligned}[t] equation stuff ...
20
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2answers
11k views

\xRightarrow (text)

I know it's possible to have \xrightarrow (text), but if I try to do \xRightarrow (text) I get an error each time. Does anybody know if it's a syntax error or if there is a other way to produce the ...
20
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2answers
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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 ...
20
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2answers
2k views

Proper use of \mathchoice

I am trying to learn how to use \mathchoice. Before the solution was posted for Non-invasive replacement for \fbox?, I attempted to use mathchoice to adjust the size of the parameter before ...
20
votes
4answers
10k views

How can I prevent inline math formulas from overflowing into the margin?

When I compile my document in LaTeX, some formulas in the document in math mode, between $ $, go into the right margin area beyond all the text. Is there a way to fix this aesthetic problem?
20
votes
1answer
889 views

What does the tilde character (~) do in math mode?

What effect does the tilde character ~ have in math mode? Is it the same non-breaking space that it is in text mode? Is it bad style to use ~ in math mode? I've seen it used in some examples but ...
20
votes
2answers
6k 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 ...
20
votes
1answer
286 views

There's a bump in the implies glyph

Edit: I understand this question has been marked as a duplicate, but the question I linked to doesn't have a solution for me (unless I'm missing something obvious, which is likely). The effect is ...
20
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1answer
597 views

Elisions in mathematics

Knuth incorporated many of the typographical rules for mathematics in the TeX engine. However some rules were left out. One such case is the use of elisions in equations. Sometimes \cdots are used and ...
20
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1answer
546 views

How would one design a math font?

There are (some very nice) text fonts which do not have math support. Though there are ways to 'remedy' this, such as the mathastext package and some others, these are hardly satisfactory. All accents ...
19
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5answers
1k views

How to typeset the limit of a sequence like so?

I want to write this: I tried with $x_n \to_{n \to 0} 0$ but the $n \to 0$ doesn't go under the right arrow, it goes under but on the right, and I want it under but in the center, as in the picture ...
19
votes
3answers
1k views

How to align limits of double integrals?

I'd like to have the limits of two integrals vertically aligned. In this example, the x and b should be positioned on the same line. \[\int\limits_x^{\infty}\int\limits_b^{\infty} x^2+y^2 ...
19
votes
3answers
934 views

Curly brace to insert something into an equation? Like an inverted underbrace

I have a generic equation, into which I want to "insert" something so that the reader can see what I inserted into the equation and at which point. E.g. \documentclass{plain} \begin{document} \[ f ...
19
votes
3answers
622 views

Visually highlighting symbolic material

I have a diagram in which I need to indicate the difference between symbolic mathematics and English words (potentially to someone who doesn't know about it): Colour works beautifully for making ...
19
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4answers
4k views

What free math font could/should accompany Linux Libertine and Linux Biolinum?

Well, the title of the question pretty much says everything. To be more precise: I'd like to know (1) what font would be visually suitable to use with Linux Libertine and/or Linux Biolinum as the ...
19
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3answers
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\DeclareMathOperator won't take arguments

I'd like to define a family of math operators that have the same superscript, but different subscripts. My first attempt was: \DeclareMathOperator{\Upd}[1]{U^M_{#1}} But the log tells me that: l.3 ...
19
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2answers
854 views

How do I format a regular expression in math mode?

I want to display some regular expression, like the following, in LaTeX math mode. \[ (F+(A+I*)*)|(F*(A+I*)+)E \] However, the spacing is all wrong, because TeX formats + and * as binary operators, ...
19
votes
2answers
361 views

How to prevent superscripts from moving under \sqrt?

When I put an expression with superscripts under a \sqrt, the superscripts (here "vis") move down a bit. How can I prevent that, so that it looks consistent no matter whether it's under a root or not? ...
19
votes
2answers
2k views

Make mathfont respect the surrounding family

How can one make the math mode change its font according to the surrounding text? I have to use (pdf)latex. xelatex, luatex etc. are not possible alternatives in this case. \documentclass{scrartcl} ...
19
votes
3answers
931 views

How can I create a new extensible symbol?

Given an arbitrary thin vertical symbol, can I create a new math delimiter from it (and if so, how)? Edit: Ideally, I would like to be able to create an extensible symbol, either built out an ...
19
votes
3answers
12k views

How to typeset function restrictions

I wonder how to typeset the restriction of a function to some subdomain, a la $f|_A$ or $f\restriction_A$ , but with the vertical bar being as big as possible.
19
votes
3answers
628 views

Remove all math for spelling and grammar checking

I'm compiling a LaTeX file to pdf and then I use a pdf to text converter to convert the file to plain text. I then use LanguageTool to do grammar checking on that plain text file. The LaTeX source has ...
19
votes
1answer
36k views

tilde over a symbol Phi

Please suggest me a way to put tilde over a symbol phi. I can easily put it over a letter but coming to the case of symbols, it is giving problems. Thanks in advance.
19
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1answer
537 views

Why \( and \) were not defined as robust commands in the first place?

I am aware of the difference between using \(...\) and $...$ (in moving arguments, for example), and yes, I've read the answers to this question: Are \( and \) preferable to $?). I also know the ...
19
votes
3answers
2k views

Why LaTeX uses upright uppercase Greek letters by default in math mode?

Why upper-case Greek letters are typeset in upright font, i.e., \mathrm? While at the same time, some upper-case Greek letters those are also Latin Letters ,e.g., A for $\Alpha$, B for $\Beta$, are ...
19
votes
1answer
961 views

Which command should I use for textual subscripts in math mode?

Textual subscripts like in W_{total} should be typeset in an upright text font (so that code isn't good practice), as has been discussed in various questions here. Now there are several ways to ...
19
votes
2answers
1k views

Placement of subscripts using unicode-math. Is it XeTeX bug?

I don't like placement of subsripts when using unicode math fonts under XeLaTeX. In contrast to CM fonts the subscripts are placed at different vertical positions obviously depending on the depth of ...
19
votes
1answer
4k views

mathtools vs amsmath

I read on http://en.wikibooks.org/wiki/LaTeX/Mathematics: The mathtools package fixes some amsmath quirks and adds some useful settings, symbols, and environments to amsmath. It sounds like ...
18
votes
4answers
2k views

How do I write $\notin$ backwards?

I write $P \niton x$, but it does not work. How can I write the symbol $\notin$ backwards?
18
votes
3answers
11k views

Footnote in math mode

How can I insert a footnote into math mode? I tried this (with required packages) \usepackage{amsmath} \usepackage{hyperref} \usepackage{ccaption} And i.e if I try \begin{eqnarray} foo && ...
18
votes
4answers
629 views

Is there any difference between quad in math mode and text mode?

Is there any difference between $a \text{\quad text\quad} b$ and $a \quad \text{text} \quad b$? I cannot see the difference as shown in the following figure. If there is no difference, which one ...
18
votes
4answers
10k views

Removing spaces between “words” in math mode

I'd like to set $1024 \times 768$ without any space between the three items. Is this possible? If so, how? E.g., what I get is: 1024 x 768 and what I want is: 1024x768
18
votes
3answers
28k views

making a big summation sign

how can I make a big summation sign ? ‎\begin{align}‎ ‎\cos x‎ ‎=‎ ‎‎\sum\limits‎_‎{n=0}^{‎\‎‎infty‎} ‎\frac{(ix)^2n‎}{(2n)!}‎‎ \end{align}‎ this is the code which I'm using for summation
18
votes
2answers
37k views

how to write ceil and floor in latex?

Is there a macro in latex to write ceil(x) and floor(x) in short form? The long form \left \lceil{x}\right \rceil is a bit lengthy to type every time it is used.
18
votes
4answers
4k views

Subscripts for primed variables

When I add a subscript to a primed variable, the subscript is rendered lower than when it is a subscript to an unprimed variable. For example, when I compile $l_x l'_x l_x l'_x l_x l'_x$ I get ...
18
votes
4answers
20k views

LaTeX symbol for “does not divide”

What is the correct way to make the "does not divide" symbol in plain LaTeX 2e? I'm talking about the symbol that is a vertical bar with a slash through it. I prefer not to install AMS or other ...
18
votes
5answers
6k views

Color underline a formula

I want to underline different parts of a formula with different colors. What is the best possible option? Soul seems only to provide one color per document.
18
votes
3answers
10k views

How to stack limits for maths operators?

I have a question on how is it possible to create a \sum with two lower limits directly positioned right underneath each other. I have tried hard and cant seem to get anywhere with it.
18
votes
3answers
3k views

Guidelines for typesetting fractions

I realize that this question is to some extent subjective. However, I suspect that there are some common standards regarding how fractions ought to be typeset in mathematics. The guide Mathematical ...
18
votes
3answers
18k views

Size commands do not work in mathmode

MWE: \documentclass{article} \begin{document} $\wedge{\small\wedge}{\tiny\wedge}$ \end{document} All the \wedges have the same size...
18
votes
6answers
3k views

Automatically replace all |foo| with \abs{foo}

Technically speaking, this isn't a LaTeX specific question, but there are so many useful tools in LaTeX, and I'm using it to solve a LaTeX problem, so I thought here would be a good place to ask. I ...