{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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5
votes
1answer
675 views

Symbol for a “twisted product”?

I am trying to make a symbol for a "twisted product". I've tried stackrel: $A \mathbin{\stackrel{\sim}{\times}} B$ but the sim floats too high above the times, causing unpleasant line spacing. ...
5
votes
4answers
492 views

The use of “tilde” changes the proximity to the set theory symbol (ref img)

I just want to format a simple set theory example. But the following is annoying: See how close the cap gets to the 'A' because of the tilde sign? I've used sim for the tilde sign. Any ...
3
votes
1answer
2k views

newline and italics added with \leq

Newbie question: Within the body of the text that I've inserted into a Journal's Latex Template, I don't understand why I get a newline and italicized font when I add the command \leq to generate ...
45
votes
2answers
44k 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: ...
2
votes
1answer
443 views

Why is the % symbol not showing with XeTeX?

I'm using XeTeX and my % symbol is not showing when I compile to PDF! I've added my code below. I've gone through the XeTeX companion guide (maybe not very thoroughly) and Googled, but I can't find ...
9
votes
3answers
7k views

Escape “> and <”

I have the following piece of text which I want to output literally: <<"Welcome">>. However it's converted to those funky quotations. I've been trying all sorts of things with \ mostly but ...
9
votes
2answers
639 views

How to create an equation library, to be called like bibtex?

I am newby in LateX, but I want to create an stand alone document to be used as a equation library where I can select my equations by calling them by name, and finally produce a list of equations used ...
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 ...
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}} ...
2
votes
2answers
3k views

Several symbols — check with box etc.

I have several symbols I don't know how to make. I have already gone to http://detexify.kirelabs.org/classify.html to try to get answers, but I failed. Please help me. ☑☒ For the check with a box ...
11
votes
2answers
3k views

How to get monospace logic formulas?

The following does not work in LaTeX because logic symbols can only be used in maths mode: \texttt{\forall x(\exists y((f(x)=y)\land(\neg(g(y)=y))))} I want to do this to stress the nature of such ...
7
votes
2answers
4k views

The standard \cup vs. the mathabx \cup

I'm interested in using the standard \cup, i.e. and the one given by importing the mathabx \cup in the same document. Does anyone know how to do that?
5
votes
3answers
1k views

Prevent hyphenation in \texttt words

Background The text contains programming variable names such as report_city and SUBREPORT_FILE. All such variables are marked up with \texttt. Problem Some variable names are hyphenated: ...
11
votes
2answers
721 views

Access specific characters in LuaTeX

Recently, I switched from XeTeX to LuaTex for a document of mine. However, there is a feature which I do not immediately see how to convert: Accessing specific characters. In particular, I need the ...
5
votes
3answers
1k views

Replace hyphenation character by a backwards arrow

I am setting e.g. directory names in a typewriter font. These names can become long. With the hyphenat package, I enabled hyphenation. Now, what is missing, is that the hyphenation character is ...
31
votes
1answer
44k views

Question mark over equals sign [duplicate]

I'd like to have output an equals sign that has a small question mark over the top of it. (I'm proving an equation, but it is not obvious until the final step that the equation is true.) Do I need to ...
3
votes
2answers
725 views

How to prevent MnSymbols from aliasing \emptyset=\varnothing=\diameter?

I'd really like to keep the default \emptyset. I also use MnSymbol. But MnSymbols aliases \emptyset and \varnothing to \diameter. How can I prevent that from happening? Could I save \emptyset ...
5
votes
1answer
6k views

Equation var with apostrophes?

So I wrote this: $\{m'_{i}\}$ Without success, (I get errors/warning) How do I write the apostrophe in Latex? Thanks;)
3
votes
1answer
861 views

Escape & Sanitize User Input

Background Generate a book with user content. Problem Names like Marie Curie-Sk\l{}odowska, when not escaped (e.g., MARIE CURIE-SKŁODOWSKA) cause LaTeX to fail. Questions What macros are ...
1
vote
1answer
3k views

How to display polynomial-time “reduction” symbol?

I'm looking for a package where is defined the symbol for polynomial-time reduction that looks like the infinity symbol. Thanks!
4
votes
1answer
3k views

Alternate Greek symbols

I remember there being a way to display some Greek letters in a slightly different style (like how people often write Greek letters a bit differently than they're printed). Can anybody remind me of ...
11
votes
4answers
3k views

Why duplicate symbol commands

I am wondering why so many duplicates of a symbol exist in latex. Let me provide some: For prime I know two types: 1. $f'$ 2. $f^\prime$ in Wiki Prime Symbol it is explained why \prime is introduced: ...
12
votes
2answers
5k views

How does one TeX a blank?

By blank, I'm looking to TeX something like this: $\{\emptyset\}$ _ $\{\emptyset,\{\emptyset\}\}$, but I want the _ to look more like a longer blank as you'd see in a fill-in-the-blank type of ...
8
votes
3answers
18k views

Arrow with text above

I am drawing an arrow using the following command: $ \xleftarrow{\mbox{\tiny{BCast}}} $‎. I have tested the command in two different environments: TeXShop (MacOS, uses TeX Live) outputs an arrow ...
5
votes
1answer
2k views

Change arrow head of \xrightarrow[]{}

I am using \xrightarrow{} in many places in my document. I want to change the tip to look like the one that gets produced by -latex. I am trying to get a similar tip for the \xrightarrow{} macro.
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) ...
7
votes
4answers
8k views

Changing “-” to \textendash

I have a large LaTeX document, where hyphens are typeset with a single dash ("-") throughout. In my font, this shows up as a bold and vertically slightly off-center blob, but I'd like it to look like ...
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: ...
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 ...
2
votes
1answer
698 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, ...
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)
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 ...
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 ...
5
votes
1answer
3k views

Different switch symbols in circuitikz?

I'm wondering if there are other commands associated with the switch symbol so that one doesn't have to specify if the switch is open or closed. I would like the switch symbol with two connectors and ...
14
votes
1answer
7k views

How to typeset block matrices?

I need to typeset a block matrix that is made of a 2X2 structure of blocks such that the (1,1) block and the (2,2) blocks are zero and the (1,2) and the (2,1) blocks are non-zero (and happen to have a ...
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 ...
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}
14
votes
2answers
537 views

Depth of the \times symbol

I just noticed an annoying discrepancy involving the \times symbol's depth. Read the below code and then try to guess what it should look like: \documentclass{article} \begin{document} \fbox{$A$} ...
8
votes
2answers
6k views

\chardef and underscore

Could you explain to me why a\_b {\ttfamily a\_b} \\ \chardef\_=`\_ a\_b {\ttfamily a\_b} produces ? I would like to have the short underscore in the normal text and the long one in ...
4
votes
2answers
741 views

\pounds in verdana is not working

This is the document: \documentclass{article} \renewcommand\familydefault{\sfdefault} \renewcommand\sfdefault{phv} \normalfont \begin{document} The jacket costs \pounds{}50. \end{document} I see a ...
22
votes
1answer
30k 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 ...
3
votes
4answers
6k views

small integral delimiter

while reading a book on maths lately, I have seen a small integral delimiter such that, in what follows: \begin{equation} \sum_i^j A_{ij}\int\limits_{-\infty}^{+\infty} \cos x dx \end{equation} ...
6
votes
2answers
1k views

Create my own mapping for XeTeX fonts

I'm trying to create mapping files, to make use of Cambria Math italic calligraphic and double stroke letters in Plain XeTeX. However, I'm unable to do so. This is what I tried to create for the ...
4
votes
2answers
615 views

How can I type the “EE” character?

I'm looking to type the "EE" character, the one that means "* 10^{x}" -- I'm trying to represent what might be typed on a Ti-84 calculator....
1
vote
1answer
3k views

Enhanced \oint to emphasize circulation

I'm looking for a symbol that merges \iint and \oint together (a dedicated package, if it could exist, would provide something like \oiint and \oiiint). The purpose of \oint is to show that the ...
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
871 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 ...
5
votes
1answer
867 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 ...
9
votes
4answers
574 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 ...
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 ...