{math-operators} is about operators in math mode. These include sums, integrals and similar, text operators like sin, cos, etc.
59
votes
7answers
10k views
What's the proper way to typeset a differential operator?
I can't seem to find any consensus on the right way to typeset a differential operator, whether it is:
in a standalone context:
as part of a derivative:
as part of an integral:
In all of these ...
41
votes
3answers
2k views
Spacing around \left and \right
Why does the addition of a \left and \right introduces an extra space around the formula? Specifically, why do $\cos(\theta)$ and $\cos\left(\theta\right)$ render differently?
Is there a way to use ...
37
votes
3answers
8k views
What's the difference between \mathrm and \operatorname?
I apparently can't see the difference in a compilation (pdflatex) between \mathrm and \operatorname. So, as in the title the question is: is there a difference? Which one is preferable in what ...
29
votes
8answers
1k views
How can I specify a long list of math operators?
The preambles of my LaTeX documents often include many many lines of \DeclareMathOperator instructions, e.g.
\DeclareMathOperator{\Rep}{Rep}
\DeclareMathOperator{\Tet}{Tet}
...
27
votes
3answers
952 views
What is the difference of \mathop, \operatorname and \DeclareMathOperator?
One sees all kind of versions in source files for defining something like a limit etc. So my question is which one serves what purpose. Is there any "best practice" in chosing one over the other?
22
votes
2answers
21k views
Command for argmin or argmax?
How can you get the argmin or argmax in Latex? Two solutions I found are:
\underset{x}{\operatorname{argmax}}
\DeclareMathOperator*{\argmin}{arg\,min}
Any other ideas?
[1] ...
19
votes
4answers
2k views
How to present a vertical multiplication/addition
How do I present vertical (columnar) multiplication and addition in LaTeX.
Like this:
http://mathworld.wolfram.com/LongMultiplication.html
3 8 4
x 5 6
---------
2 3 0 4
1 9 2 0
---------
2 ...
18
votes
4answers
3k views
Define additional math operators to be typeset in roman
Mathematical operators, such as function names, should be set in roman type, not italics. Latex already has commands for some operators, including \max, \min, and \log. How can I define additional ...
17
votes
2answers
490 views
How do you create .+?
I would like to display a = b .+ 1
But it is displayed as a = b. + 1 (moves . next to b).
16
votes
1answer
273 views
Load integral sign from eulervm
I want to write a book for university and I want to have the "german" integral symbol in it. I tried using mathabx and wasysym but I don't like them. But I like the integral symbol in eulervm.
How do ...
15
votes
3answers
335 views
Typesetting the square of a mathematical operator
Assume I want to typeset the square of some mathematical operator A. Using \operatorname (amsmath package), there are basically two ways to do that:
\(\operatorname{A^{2}}\) (i.e., the exponent is ...
15
votes
2answers
2k views
newcommand vs. DeclareMathOperator
As far as I understand, whatever can be done using DeclareMathOperator can also be achieved using newcommand, but not the other way around. If this is the case, what are the circumstances where ...
14
votes
3answers
14k views
How to do the 'curvy L' for Lagrangian or Laplace Transforms?
I am new to TeX, working on it for about 2 months. Have not yet figured out how to script the 'curvy L' for Lagrangian and/or for Laplace Transforms.
As of now I am using the 'L' - which is not good! ...
14
votes
2answers
1k views
Lower and upper Riemann integrals?
How can I make an integral symbol with a bar above it or a bar below it?
14
votes
1answer
412 views
R-Integral symbol for my notes
I am typing up a set of notes for the Riemann Stieltjes integral. For reasons beyond the scope of the question, I would like to start with defining the Darboux's integral and then formulate Riemann's ...
14
votes
1answer
391 views
Customized summation symbol
I am interested in defining some customized math symbols out of existing ones. For example I would like to distinguish between different types of sums, so beside the usual symbol
I would like to ...
13
votes
4answers
271 views
Creating a circled operator which expands into a lozenge
I have a LaTeX document which has a binary operator called "composition". Normally, this is written as a circled letter, where the letter is passed as a parameter: \comp{x}. I can achieve good results ...
13
votes
2answers
2k views
How do I do a one-shot MathOperator?
The amsmath packages helpfully define a macro \DeclareMathOperator which does what it says on the tin: it declares a mathematical operator such as \sin or \Null or whatever and typesets it all nice ...
12
votes
4answers
382 views
Is there another symbol that is slightly different from \forall (likewise for \exists)?
What
Is there a symbol that is slightly different from $\forall$ (e.g. having a second line from upper left to lower middle)? It should obviously mean "for all" but be sufficiently different to not ...
12
votes
1answer
390 views
Double sum over i and j with i \neq j
I would like to represent a double sum with i\neq j. So I want two capital sigmas with text i\neq j underneath them. How can I achieve this?
12
votes
2answers
362 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. ...
12
votes
3answers
5k views
Supremum of the infimum
Consider the following snippet:
$$\text{d}_{H}(A,B) = \max\left\{ \sup_{a\in A} \inf_{b\in B} \text{d}(a,b),\sup_{b\in B} \inf_{a\in A}\text{d}(a,b)\right\}$$
In the output, the text under the ...
12
votes
1answer
173 views
Problem with “equal” sign and glossary entry definition
I am using glossaries package and I encountered a problem in the symbol field. When I define it as $m=1$ I get the following error message:
! Missing $ inserted.
<inserted text>
...
11
votes
3answers
969 views
Correct spacing when using \sim as negation
When using \sim as a symbol for negation it gives incorrect spacing and this is clear if the spacing is compared to the spacing of \lnot:
How can the spacing be corrected?
\documentclass{article}
...
11
votes
3answers
10k views
How to add text under symbol in equation ?
I was trying to make something like this
(something similar to \substack in \sum) in equation. How to do this ?
11
votes
5answers
2k views
Define strange operators
I' looking for a symbol rendering the connected sum of $n$ topological spaces (or other quite strange topological operations) in a "product-like" manner... What For example in writing
$$
...
10
votes
2answers
606 views
Phantom width of binary operator
Using beamer. Let's say I want to write A+B but with the plus invisible in one slide and visible in the next one. I think I read somewhere that more space is left normally around the + for being a ...
10
votes
2answers
274 views
Writing the Existential Quantifier with Lower and Upper Limits
When I write $$\sum_{i=1}^{n} x_{i}$$ I obtain indices which are below and above the symbol. I want to write the existential quantifier with this same formatting, but when I try to do so, it appears ...
10
votes
2answers
873 views
Getting the expectation symbol to behave like $\sum$ instead of $\Sigma$
How can I get an expectation symbol which behaves like $\sum$? Specifically, I want the underscore to be like that of a summation. At the moment I use
$$\mathbb{E}_{x\in A}$$
However, I do not ...
10
votes
2answers
3k views
Limits under multiple \sum
I would like to place a lower limit under two consecutive \sums, somewhere in between. So I have \sum_{j=1}^{\infty}\sum_{k=1}^{\infty} and would like to place j>k in the lower limit between the ...
10
votes
2answers
94 views
Strange spacing when putting a math macro before a binary operation
I found there to be very odd spacing when using a math macro just before a binary operation. Here is a minimal example:
\documentclass[11pt]{article}
\usepackage{amsmath}
...
10
votes
2answers
73 views
How can I use \lVert and \rVert norm symbols (‖x‖) with the Iwona math font?
I want to use \lVert and \rVert to denote the vector norm.
With Computer Modern this works quite fine. But when trying to use Iwona as a math font, I run into trouble:
\documentclass{standalone}
...
10
votes
3answers
207 views
Should there ever be a thin space between an operator and an opening delimiter?
For instance, is it correct to use $\sin\lvert x\rvert$, not $\sin|x|$, for the sine of the absolute value of $x$? I think that since the argument of $\sin$ is $|x|$, it makes more sense to have a ...
10
votes
1answer
1k 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}}
...
10
votes
1answer
446 views
Making \sim a unary operator
Often in physics, the symbol \sim is used as a unary operator to mean "approximately."
For example, one might say "the energy of these processes is $\sim 4$ eV." However, this looks awkward because ...
9
votes
3answers
506 views
How do I put a circle around an operator?
For example, I want to put a circle around \land, just like one can put a circle around + by writing \oplus. Is there a general method to do this?
9
votes
4answers
215 views
How to construct a logic argument with colored hline with length under control?
How to construct a logic argument like this one?
I can construct it like this:
Latex of my argument:
\documentclass[10pt]{article}
\usepackage{newtxtext}
\usepackage{newtxmath}
...
9
votes
3answers
608 views
Spacing between triple vertical lines
I would like to create a norm-like operator with 3 verticals bars instead of two. It has to look like $|||\cdot|||$. I would like to know how to decrease the spacing between the vertical bars such ...
9
votes
4answers
801 views
How to create my own math operator with limits?
How can i write my own math operator with limits? I want it to look like:
\sum\limits_{e=1}^{m}
but with a capital A (if possible bigger than the normal text) instead of the sum.
Thanks for the ...
9
votes
2answers
100 views
Mixing math character classes (e.g. \mathord to the left and \mathrel to the right)
It is possible to have a symbol or group behave to the left as if it had one particular math character class and to the right as if it had another?
One typical case where this comes up is when one ...
9
votes
4answers
5k 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.
9
votes
1answer
84 views
How can I get a symbol to behave like an infix operator?
For example, how can I get "x \overline{*} y" to parse like "x * y"? I know I can adjust the manual spacing using "\,", but is there a less superficial way?
9
votes
1answer
121 views
Using Color Commands for Math Operators
I was wanting to know how is it possible to create a math symbol in color to position correctly. I have used the following but the top limit does not center properly. Sorry for the verbage as I don't ...
9
votes
1answer
842 views
Putting limits *underneath* new operators
I'd like to declare a new math operator called the "strong limit" as follows:
\DeclareMathOperator{\slim}{s-lim}
So it's just "lim" (i.e., \lim), but with an "s-" in front. I want to be able to ...
9
votes
1answer
260 views
How can I make LaTeX ignore certain math symbols in math mode?
I have the following equation:
<trigger threshold> = average - (<trigger fraction> * average)
I want to print this in math mode in a very specific way: <trigger threshold> and ...
8
votes
2answers
4k views
Is there a LaTeX symbol for 'order'?
Is there a symbol for order?
...the exponent, ei , is called the order of pi in a, denoted ordpi (a) = ei .
8
votes
5answers
332 views
Is there a more correct way to show explicit exponential operators?
I typed in this question like this:
$\underbrace{\alpha \hat{\phantom{\hat{}}} \alpha \hat{\phantom{\hat{}}} \dots \hat{\phantom{\hat{}}} \alpha}_\text{n times}$
which mathjax prints as
I feel ...
8
votes
1answer
405 views
Correct way to typset esssup (essential supremum)
What is the correct way to typeset essential supremum, with the limits underneath the operator? My first try was \operatorname{ess}\sup\limits_{x\in[0, 1]}, but this puts the x\in[0, 1] under the sup ...
8
votes
2answers
173 views
typesetting 2 line conditions over which is summed
I am trying to typeset the formula below in a way that m_j=m_i and z_j=z_i have the same scriptsize, the = are aligned, and j: is before both, larger and with vertical position between the lines. How ...
8
votes
1answer
326 views
The font of operator names
What is the correct way of having all operator names be set in, say, sans serif? Saying
\documentclass{article}
\usepackage{amsmath}
\makeatletter
\def\operator@font{\sf}
\makeatother
...
