{symbols} is about specific non-alphabetic symbols or math symbols, e.g., about looking-up, constructing, or using symbols. For questions about {fonts} or alphabetic {characters} use the respective tag instead.

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2
votes
1answer
697 views

Custom radical sign with plain XeTeX

I would like to use Cambria Math font in mathematical equation, and I have a simple problem here. plain TeX uses many symbols for the root sign, so it can use the proper one depending on context, ...
24
votes
2answers
20k 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 ...
8
votes
3answers
18k views

Big \sum instead of small \sum in array environment

\begin{align*} \begin{array}{c} \min \: A = \min \: \sum_{i\in B} C_i \\ \ \min \: D = \min \: \sum_{i\in B} \pi_i \cdot F_i \end{array} \end{align*} How can I get i \in B below the \sum symbol ...
44
votes
2answers
43k views

\bm package versus \boldsymbol

I'm typing a bold vector small x with a tilde sign above it. Now when I want to write its derivative, I'm putting a dot on top of everything. This is giving me problems and I found one solution: ...
16
votes
2answers
11k views

How to get a vertical bar which is longer than \mid ?

sometimes when writing mathematical expression with partial derivatives, one needs to write a vertical bar afterwards and write the value at the which the partial derivatives are being computed as ...
2
votes
1answer
870 views

Changing the kpfonts \sum symbol

I like the kpfonts package. It's a nice font and some of the extra symbols it defines are sometimes useful. But I do not like the \sum symbol either in displaystyle or inline. It's too thin and too ...
17
votes
3answers
3k views

How do I change the font of a letter?

This is a partial re-asking of my question Can I change the font and colour of a letter permanently?. The answers there focussed on the colour aspect of what I wanted. I also want to be able to ...
5
votes
1answer
864 views

How do I convert a character to a numeric value?

Now that I've gotten Will Robertson's excellent unicode-math package working to change the colour and style of letters in my mathematics (trust me, there is a reason) thanks to his answer to my ...
27
votes
4answers
15k views

Guillemets in LaTeX («»)

I need the characters «» in my LaTeX document. I'm writing in English though, and I don't want to use Babel. I have the following hack but I'd like a better way: \newcommand{\q}[1]{{% \font\larm = ...
11
votes
5answers
4k views

How do I stack more than two arrows in math mode?

The command \rightrightarrows (from amssymb) draws two arrows, one on top of another. How do I get three arrows arranged in a similar fashion? An example of this (and other fancy arrow stackings) ...
28
votes
3answers
11k views

Why isn't \prime automatically set to be a superscript?

In math mode, writing \prime gives too big a "prime" symbol, and it isn't a superscript, like it always is in textbooks. Why is this? This isn't a question about how to get \prime to be a ...
9
votes
4answers
573 views

Change the shape of a fraction

Is it possible to change the bar in a fraction to a different symbol? ie. \frac{x}{y} But instead of a straight line, I'd like to choose the delimiter to say \overbrace. I know I can get rid of the ...
7
votes
4answers
739 views

New Large Math Symbol

I want to use symbols from the phaistos package as "numbers" This means that I want to type something like: \documentclass{amsart} \usepackage{phaistos} \newcommand{\lo}{\text{\PHbee}} ...
5
votes
1answer
2k views

How to make a command for a composed symbol to work with all font sizes?

In my paper I need a letter $\mathbb{R}$ with a small circle above it. Currently I'm using the following command: \newcommand{\obbR}{{\mbox{\kern1.4pt \raisebox{7pt} {\scriptsize$\circ$} ...
2
votes
1answer
241 views

Equals sign in the pdftitle using hyperref

I have a paper with an equation in the title, and I would like to include the equals sign in the pdf metadata by using the hyperref key "pdftitle", by including it as in the following: ...
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 - ...
147
votes
4answers
251k views

Why do the less than symbol (<) and the greater than symbol (>) appear wrong as upside down exclamation (¡) or question mark (¿)?

When typing < or > in LaTeX and compiling with pdflatex, the less than and greater than symbols appear at upside down exclamation points. I'm not in math mode.
15
votes
8answers
586 views

The trestle problem: how to avoid >=< in the output

TeX puts no space between \mathrel characters, so one can type := to make a definition. But careless authors often type stuff like < a, b > = < c, d > to indicate that two scalar ...
13
votes
4answers
2k views

Substituting character $l$ with $\ell$ throughout math mode

How do I overwrite the default $l$ character so that it is substituted by $\ell$ throughout math mode? (More generally, is there an easy way to make such symbol substitutions?)
15
votes
3answers
4k views

Strategies for nice vectors

I'm investigating about possible strategies to get nice vectors, discarding bold fonts. To make it simple, I'm not very happy with traditional ways of writing vectors with arrows. Please compare ...
23
votes
2answers
31k views

Cursive, lowercase ell

What is the easiest way to make a cursive, lowercase ell in LaTeX math mode?
14
votes
4answers
12k views

How to make a larger “\dot”

I'm writing up some notes that will be displayed on an overhead projector. The standard time-derivative \dot{x} produces a dot that is hard to see. Does anyone know of a package or have a macro that ...
46
votes
4answers
36k views

How to insert pipe symbol in (La)TeX?

How to insert pipe symbol | in TeX (LaTeX)? I have tried this sample with pdflatex tmp.tex \documentclass{extarticle} \begin{document} \textpipe \end{document} And it give undefined control ...
4
votes
2answers
2k views

How do I get a proper mathematical \Lambda when using gfsneohellenic?

I am using the gfsneohellenic for my paper (which is in English). I load it using: \usepackage[LGR,T1]{fontenc} \usepackage[default]{gfsneohellenic} Everything works fine except for capital greek ...
50
votes
2answers
47k views

how to get good looking copyright and registered symbols

I'm trying to include copyright © or registered ® symbols in my document. However they look terrible! As far as I can tell it is generating a small caps letter with a big circle around it (not even ...
7
votes
2answers
1k views

What is the best way to obtain a “vertical” subset symbol?

I am trying to typeset a table indicating various kinds of $\subset$ relations for objects in a grid. Is there a way to obtain a subset symbol that applies vertically, between objects where one is ...
18
votes
3answers
20k views

How to type three points diagonally?

In an equation, I want to display three points like "...", but instead of horizontally, they should be diagonally. I'm sure there must be a command to do that, but a google search did not really help. ...
3
votes
2answers
257 views

Typeset Re(a+ib)

How to typeset the "Re" of Re(a+ib) correctly inside an equation in latex? I tried using \mathcal and \mathbb but it does not give me the typical rounded R I already saw in other documents... Any ...
18
votes
5answers
15k views

Why can I only use some capital greek letters inside my equations?

For example: \begin{equation} \delta % ok \Delta % ok \epsilon % ok \Epsilon % error \end{equation}
10
votes
2answers
14k views

How to type the three dots in a product?

I have to type the product of n variables, $x_1\cdot\ldots\cdot x_n$. Although maybe this is semantically the right way (like it is for the sum), it doesn't look very well. What should be, ...
3
votes
2answers
6k views

Why does the less than equal to symbol not appear as intended in the following code?

When I use the following code on stats.stackexchange.com (which is powered by MathJax) the \le does not render properly. Is this a bug in MathJax or am I not using the \le symbol properly? $X_3 = ...
10
votes
2answers
2k views

What font package do I use to get the vertical Russan/German style integral signs?

What font package do I use to get the vertical Russan/German style integral signs? (subject says all)
19
votes
3answers
4k views

Indian rupee symbol

India has recently introduced a new symbol for its currency, the Indian rupee -- see http://en.wikipedia.org/wiki/Indian_rupee_sign. How can I typeset this in TeX / LaTeX?
89
votes
5answers
60k views

Symbols instead of numbers as footnote markers

How can I make LaTeX use symbols (*, †, ‡, and so on) instead of numbers to mark footnotes? (The numbers are confusing because I use superscripted numbers for citations.)
18
votes
7answers
14k views

Average integral symbol

Is there in LaTeX a symbol or a macro for the average integral with a horizontal slash? I know about \strokedint, but I'd prefer the dash to be horizontal.
75
votes
2answers
14k views

How to get rid of navigation symbols in beamer?

When creating presentations in beamer, those little symbols that you can click on and will take you to different parts of your presentation are automatically included on your slides. I don't like ...
193
votes
10answers
324k views

How can I get bold math symbols?

To make Latin-letter variables bold I can use e.g. \mathbf{a}, but while putting Greek letters or symbols such as \nabla inside \mathbf doesn't cause any errors or warnings, it also doesn't do ...
43
votes
6answers
26k views

What is the best way to use quotation mark glyphs?

There are several types of quotation marks in the English language (and in other languages there are even more). There are also several ways in LaTeX to represent these. I have seen editors, that are ...
100
votes
4answers
83k views

\mid, | (vertical bar), \vert, \lvert, \rvert, \divides

What's the difference between the different vertical bars? $S = \{\, x \mid x \not= 17 \,\}$ $a \vert b$ implies $a \leq b$ when $b \ne 0$ $a|b$ implies $a \leq b$ when $b \ne 0$ $\lvert x \rvert$ is ...
8
votes
3answers
819 views

Glyph insertion

I use Linux and have available to me the "compose" key, and thus can type characters like '°', 'ß', 'ï', 'į', 'ḯ', etc. Is it inherently "bad" to use the compose key to insert the characters, should ...
4
votes
2answers
480 views

Does LaTeX support the sarcmark?

Does LaTeX have an escape sequence for the open source sarcmark?
14
votes
3answers
2k views

Can I change the font and colour of a letter permanently?

For my lectures, I like to colour the symbols in the equations to make it easier to follow what's going on - a bit like syntax highlighting. So all vector spaces are one colour, all sets another, e ...
97
votes
8answers
47k views

Correctly typesetting a tilde

How do I set the tilde (~) character correctly in LaTeX? There’s a question discussing that on Stack Overflow, with a lot of answers. But dare I say it? They all suck: \textasciitilde is too high, ...
11
votes
1answer
3k views

Slashed symbols

In my field of work, mathematical operators that live on reduced dimensions are customarily defined as the normal one with a slash through it. For example, the gradient is usually written as \nabla, ...
82
votes
9answers
76k views

What's the best way to write e-mail addresses?

When trying to write an e-mail address, there are always problems with the @ sign. Solutions I've seen suggested are using some verbatim environment (more difficult in footnotes) and using a ...
8
votes
3answers
3k views

Using custom symbols

As comprehensive as the existing set of symbols is, it doesn't have every possible symbol that could exist, and it really takes the fun out of inventing a new symbol if you can't typeset it nicely. ...
379
votes
13answers
65k views

How to look up a symbol or identify a math symbol or character?

I know what my symbol or character looks like, but I don't know what the command is or which math alphabet it came from. How do I go about finding this out?
488
votes
9answers
724k views

How does one insert a backslash or a tilde (~) into LaTeX?

How does one insert a "\" (backslash) into the text of a LaTeX document? And how does one insert a "~" (tilde)? (If you insert \~, it will give you a tilde as an accent over the following letter.) ...