17
votes
3answers
302 views

How to write ≙ in latex

I want to use unicode character 2259 "estimates" in my document, but cannot find it in the symbols-a4 list or via detexify. It looks exactly like this: ≙ The closest I get is \triangleq: ≜, but it ...
4
votes
2answers
194 views

LaTeX symbol for “divides precisely”

I sometimes need to write that a certain prime p^k precisely divides a number n, meaning that p^k | m but it is not the case that p^{k+1} | m. It is often written as: p^k || m, where the symbol in the ...
1
vote
1answer
61 views

LaTeX code for text above the $\rightarrow$

Hi I am wondering what code is used to get text above the $\rightarrow$ have tried $ \xrightarrow{P}$ but not running on my LaTeX as I do not know which package to install or how to install it. ...
1
vote
0answers
21 views

Text over symbols, but with adjusting width ( something like \stackrel{#1}{#2} but with same size) [duplicate]

I would like to write something above equation sign. One may do it with \stack{#1}{#2} command and it works fine if #1 and #2 are the same length, example: $\stackrel{(3)}{=}$ will result in ...
5
votes
2answers
93 views

Create longer arrows

I currently use two relation symbols as shown below. However, as I need to put in quite a bit of information above and, in the first case, also below the arrow, I'd like to have longer arrows. In my ...
5
votes
2answers
187 views

Not independent Sign in Latex

I want to do the not independent sign in latex without having to install or define new commands (since I am using latexIT and I cannot load new packages). Currently I use the following sign for ...
1
vote
1answer
279 views

What is the TeX/LaTeX symbol for subgroup (not normal subgroup)?

We all love normal subgroups, and in searching the web for the answer to my question I've found plenty of resources for ways to indicate normal subgroups. That's not what I'm looking for. When one ...
1
vote
2answers
181 views

Delta-equal to symbol [duplicate]

How do you write the equal-to symbol with delta on top ("delta-equal to")? One similar to http://www.decodeunicode.org/de/u+225c. Are special packages required for that? It is supposed to be used for ...
10
votes
2answers
226 views

Fuzzy logic operator symbols

How can I write in Latex symbols for standard or Łukasiewicz conjunction like these? Thank you
0
votes
0answers
461 views

How to put therefore and implies symbols

\documentclass{article} \usepackage{graphicx} \begin{document} \vspace{\baselineskip}\noindent \textbf{THEOREM :} If an operator has both Left Identity and Right Identity then it is \emph{UNIQUE}. ...
9
votes
2answers
610 views

Is there a difference between \bot and \perp, when they are used in exponent?

I am used to write $M^\bot$ for the orthogonal complement of the set M. Is this incorrect? I have seen this question, the answer there says that these two symbols have different spacing. (One of ...
8
votes
3answers
330 views

How to write a pretty \not \varepsilon

How can I write a pretty \not\varepsilon? I want something like \notin, since I use \varepsilon as a relation symbol like \in.
14
votes
2answers
1k 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| ...
8
votes
1answer
159 views

a ∣ b and a ∤ b in formulas

What is the correct way, both semantically and typographically, to typeset a ∣ b and a ∤ b (read “a divides b” and ”a does not divide b”)? I guess I could simply type | (vertical bar, U+007C) or ...
29
votes
3answers
845 views

New relation symbol

I am defining a new relation in one of my new papers. I want to use the following symbol, because it conveys the meaning of my relation. Is there such a symbol in LaTex ? It is very similar to \leq ...
20
votes
4answers
104k 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 ...
7
votes
1answer
611 views

Difference of perp and bot

I saw in math.stackexchange that someone uses \perp for what I always use \bot. In XeLaTeX: lost \perp in Cambria math? it says that they are two different symbols, do they just look the same? I ...
5
votes
1answer
1k views

What is a good method for producing a unary plus/minus sign that always works?

Say I have a macro that does something in math mode (say, change the mathalphabet). This macro, \somecommand, takes one argument. I might want use is like this, feeding an empty argument into it: ...
10
votes
4answers
610 views

What is a simple way to create a binary relation symbol on top of another?

What is a simple way to have \ll on top of \gg with equal size and vertically center aligned and have them work as a binary relation symbol like \lessgtr? The commands \underset and \overset cannot be ...
0
votes
1answer
108 views

relational symbol for “the same strings” [duplicate]

Possible Duplicate: How to look up a symbol? How to get the following relational symbol in the attached image? It's an altered equal-sign and is used by our tutor to denote "the same ...
2
votes
2answers
362 views

$\models$ vice-versa as semantically equivalent

How to get the $\models$-symbol vice-versa to form a symbol for semantically equivalent like the following: =||=
9
votes
2answers
3k views

Why is \mid so called?

The LaTeX commands \mid and \vert may be used to make a vertical bar. I can appreciate that \vert is short for vertical, but why \mid? Is it short for middle? and if so, middle of what?
14
votes
4answers
10k views

A better \pm symbol

I am looking for an alternate to the \pm symbol, and wondering if I am the only one bothered by it as I see that this has not been asked yet. I have attempted to define one using my standard ...
5
votes
0answers
177 views

Alternate “colon equals” sign [duplicate]

Possible Duplicate: How to typeset $:=$ correctly? One of the first math books I read used "A := B" to mean "A is defined to be B". In the font used in that book, the upper dot of the ...
25
votes
5answers
5k views

Is there a wider equal sign?

I have defined the equal by definition sign: with this code: \newcommand{\eqdef}{\overset{def}{=}}. However, "def" extends over the edges of the equal sign. Is there a wider equal sign to use?
25
votes
4answers
2k views

How to get a good “divisible by” symbol?

In addition to the "divides" relation, denoted b | a, there is also a "divisible by" relation expressing the converse (a is divisible by b), often designated with three vertical dots. Up until now, ...
12
votes
2answers
509 views

Symbol for skeptical consequence that matches the turnstile package

This might be seen as a follow up to Symbol for skeptical consequence. From it I got answers so that I could write that B is a skeptical consequence of A such as which Peter Grill's code produces. ...
26
votes
4answers
32k views

Typesetting the “define equals” symbol

I'd like to typeset two compound symbols for making definitions. The following \newcommand{\defeq}{\mathrel{\mathop:}=} \newcommand{\eqdef}{\mathrel{\mathop=}:} are suggested by the CTAN symbol ...
4
votes
2answers
10k views

Symbol about not orthogonality in LaTeX

I found this post, which explains orthogonal and not orthogonal symbols. I was able quickly to find the orthogonal symbols as \perp, \upvdash etc., but not able to find a top line which strikes the ...
13
votes
4answers
14k 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 ...
4
votes
2answers
1k views

Easy way to type more kinds of arrows?

There is \rightrightarrows to produce two parallel arrows, \longrightarrow to produce a longer arrow and \xrightarrow to produce an extendable arrow. But is there an easy way to produce two long ...
37
votes
6answers
3k views

\subseteq + \circ as a single symbol (“open subset”)

I'm trying to create symbols \opn for "open subset" and \cls "closed subset". I want them to look like this: My current solution is: ...
30
votes
5answers
11k views

What's a good way to write “x does not divide y”?

The way I currently do it is $x \not | y$, which looks awful. There's got to be something better available.
64
votes
8answers
14k views

How to typeset $:=$ correctly?

I like to use $:=$ for "is defined to be equal to", but this is never typeset with the symmetry one would like, as the colon is always too low relatively to the equals sign. Is there any way of ...