{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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27
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1answer
807 views

What exactly is a “single character” or “symbol” in math mode?

There are at least three instances where single symbols in math mode receive a special treatment by the TeX engine: 1. when accents are placed, 2. when a math operator is created with \...
26
votes
9answers
1k views

Best typesetting of formula

Consider the following example. \documentclass{article} \usepackage{amsmath} \newcommand*\mathsetfont{\mathbf} \newcommand*\DeclareMathSet[1]{% \expandafter\newcommand\csname set#1\endcsname{\...
26
votes
6answers
8k views

Upright Lowercase $\pi$

On pg. 144 of Kopka and Daily's A Guide to LaTeX, they mention that the symbols $e$, $i$, $d$, and $\pi$ should be displayed upright in math mode (for their usual uses). This is easy to do for $e$, $...
26
votes
3answers
8k views

Overlay symbol with another

Is it possible to overlay a symbol with another? I want to write an equal sign with a question mark overlayed (or the other way around). Note I don't want \stackrel{?}{=} I want the question ...
26
votes
1answer
39k views

How to write crossed-out math in LaTeX? [duplicate]

Possible Duplicate: Draw a diagonal arrow across an expression in a formula to show that it vanishes As you might know from my other questions, I am still a newbie at LaTeX, so please don't ...
26
votes
6answers
3k views

Bad positioning of math accents for the beamer standard font

With a recent TeX distribution, the easy answer to this question is "load the sansmathaccent package" (which is Ariel's implementation of my answer). Actually, the corrected font should be loaded ...
26
votes
7answers
23k views

Typeset mathematical symbols also in sans serif font?

For creating the graphics for my thesis (function graphs, flow charts, line art sketches) I've chosen to use the sans serif font by \renewcommand\familydefault{\sfdefault} However when I use ...
26
votes
2answers
6k views

Difference of the \dots*

I came to wonder, what is the difference between the following? \dotsc \dotso As well as between: \dotsb \dotsi \dotsm
26
votes
3answers
442k views

Not equal sign (≠) with a vertical bar

Is it possible to get a \neq but with a vertical bar instead of a slanted one? There are inequality operators like AMS's \gvertneqq that feature this kind of "not equal" but not without mixing it with ...
26
votes
3answers
10k 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 ...
26
votes
2answers
14k views

Upper triangular matrix with big zero in lower triangular?

I can represent an upper trapezoidal matrix say as shown below. I would like to replace all those zeros with a single big zero that spans across the low triangle rows and columns, and maybe also add a ...
26
votes
1answer
2k 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 ...
25
votes
4answers
1k views

A rather difficult ring like picture to be drawn

I desire a figure similar to the following: \documentclass[tikz,margin=10pt]{standalone} \usepackage{mathtools,amssymb} \begin{document} \begin{tikzpicture}[scale=2,transform shape] \draw (1,0) ...
25
votes
3answers
28k views

Dot Derivative Discrepancy

I am trying to typeset some higher-order time derivatives using the dot notation, and I've noticed something strange. The expressions $\dot y + y = \cos(\dot y)$ $\ddot y + y = \cos(\dot y)$ give ...
25
votes
2answers
6k views

How can I prevent LaTeX from breaking inline formulas globally?

I am using the acmsmall template and my inline formulas are being broken at equal signs and arrows; how can I prevent them from being typeset like that globally (i.e. without having to put tildes ...
25
votes
2answers
27k 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 ...
25
votes
2answers
15k 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 ...
25
votes
3answers
3k views

Why are so many symbols restricted to math mode?

A common beginner's mistake is to forget \(...\)/$...$ around symbols that require math mode. Why doesn't (La)TeX let people use isolated symbols in text mode by default? I am sure there are at ...
25
votes
1answer
32k views

How do I insert a backslash inside a mathematical statement?

I'm trying to write a set subtraction operation in an AMS formatted template. In the end, what I want should look like A\B. But I'm doing this in math-mode $A\B$ and this gives me errors. I've also ...
25
votes
3answers
26k views

1st, 2nd and i-th?

Assume I wish to refer to the i-th object, or the n-th function out of some set, where i and n are letters and not numbers (as in "Multiply the $j$th row with the $i$th column and store the result in ...
24
votes
3answers
932 views

Strange default exponent positioning?

Why is this red exponent so far away from the right parenthesis? To my eye it is too far away. \documentclass{article} \usepackage{xcolor} \begin{document} \[ax^2+bx+c=a\left(x+\frac{b}{2a}\right)^{\...
24
votes
6answers
6k views

Is it possible to use Linux Libertine as a mathematical font?

I recently heard that there is a package called unicode-math that makes it possible to use an ordinary TTF/OTF font for mathematic typesetting. To what degree is that possible with Linux Libertine? I ...
24
votes
3answers
28k views

Double superscript error

I'm a relative beginner with Lyx. When I type in this code I'm hoping for T' to be followed by superscripts and subscripts. Instead I get a "double superscript" error when I try to view the pdf \[ T'...
24
votes
3answers
17k 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.
24
votes
5answers
6k 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 ...
24
votes
3answers
7k views

\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 ...
24
votes
2answers
6k views

Automatic thousands separators?

I want to typeset big numbers with a separator (e.g a space or a ",") between hundreds and thousands, etc... For example 1 Million = 1 000 000. I know the package siunitx which does it very well, but ...
24
votes
2answers
21k views

How do I use a circle as a math accent (larger than \mathring)?

To denote the interior of a set, I'd like to have a command \interior. Now, as one can learn from this post, one possibility is to use \mathring. This is a neat command, but it produces a circle that ...
24
votes
2answers
7k views

divides, not divides and cardinalities

In group theory it happens very often that you want to say: "The order of $H$ divides / does not divide the order of $G$." But the length of | is then always the same: $ |H| | |G| $ produces |H|||G| ...
24
votes
3answers
651 views

How to capture the current math style?

\mathchoice helps to distinguish between math styles: \mathchoice {<something in \displaystyle>} {<something in \textstyle>} {<something in \scriptstyle>} {<something in \...
24
votes
1answer
516 views

Sloppy \left and \right?

The \left and \right commands often produce improvidently large delimiters. It almost always looks better to use delimiters that are just slightly too small than delimiters that are too large. With ...
24
votes
1answer
731 views

is there a “size-independent” method for overlaying two symbols to form a composite?

in this question a composite symbol "diamond plus" is requested for use with plain TeX. a good-looking version was provided, but it works in only one size. if the same symbol is needed for a title or ...
23
votes
4answers
27k views

Evaluation of Differentiation and Integration

I was having some thought about what would be the syntax to make the end point evaluation of derivatives or integrals. Such as making the | with the two end points of evaluation on the top an bottom ...
23
votes
3answers
18k 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 && ...
23
votes
2answers
32k views

Cursive, lowercase ell

What is the easiest way to make a cursive, lowercase ell in LaTeX math mode?
23
votes
3answers
50k 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
23
votes
4answers
35k 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 ...
23
votes
3answers
740 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 ...
23
votes
5answers
44k views

How to write cases with LaTeX?

The code i used to write is this one $$ X(m,n)= \begin{cases} x(n),\\ x(n-1)\\ x(n-1) \end{cases} $$ But I don't know how to write this one I appreciate any help. Edited: I'm sorry to add ...
23
votes
2answers
17k 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 ...
23
votes
3answers
2k views

maths nested superscripts and subscripts displayed incorrectly inline

I am having a strange bug when using nested superscripts and subscripts in inline math (displaystyle works fine). This behaviour is the same independently of the font used or the compiler (orginally ...
23
votes
2answers
40k views

Writing mod in congruence problems without leading space

I have been writing $a \equiv r (\mod n)$ but this puts a space between the ( and mod. For example, r ( mod n ) instead of r (mod n). So, how do you write r (\mod n) without that space? What ...
23
votes
2answers
3k views

The mysteries of \mathpalette

I would like to make a macro, \vfrac, which output would look like: $$\displaylines{ \displaystyle\raise.25ex\hbox{$\displaystyle1$}\!/\!\lower.5ex\hbox{$\displaystyle2$} \cr \textstyle\raise....
23
votes
2answers
23k views

\star vs. \ast in formulas. Which one to use?

When you read a formula aloud you say "r and r-star are related by this formula". If you write this formula down you normally write an r with a six-handed star, which would actually be an asterisk and ...
23
votes
1answer
31k views

Mapsto vs. rightarrow

This is perhaps half a math question and half a typesetting one. In what circumstances do I use \mapsto and when \rightarrow? I feel like the standard seems to be: when you're specifying the operator ...
23
votes
2answers
3k 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 ...
23
votes
2answers
24k views

double perpendicular symbol (for independence)

I found from http://jblevins.org/notes/latex that I could use the independence symbol: \newcommand\independent{\protect\mathpalette{\protect\independenT}{\perp}} \def\independenT#1#2{\mathrel{\...
23
votes
2answers
6k 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 "...
23
votes
1answer
174 views

Why is the fraction off the math axis in XeTeX?

The fraction in textstyle is off the math axis in XeTeX when I use a Unicode math font. In LuaTeX, though, it aligns nicely with the math axis. The follwing MWE should illustrate this. Also, in ...
22
votes
5answers
6k 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?