# Tagged Questions

{math-operators} is about operators in math mode. These include sums, integrals and similar, text operators like sin, cos, etc.

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### Concatenation of strings symbols

In his 1989's Theorem for free! (doi: 10.1145/99370.99404, preprint in .dvi) paper, Wadler typeset the concatenation operation with two "plus" signs collapsed: I asked write-math.com and Detexify to ...
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i am trying to add multiple limits. not through multiple \begin{atmProof} $F'(x)$ = $\lim_{h\to0} \frac{F(x + h) - F(x)} {h}$ = $$\lim_{h\to0} \frac{f(x+h)g(x+h) - f(x)g(x)} {h}$$ \\ Now we ...
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### Use mathrm + isomath with beamer

I use isomath to make greek letters italic by default. Sometimes I want an upright operator. Then I use \mathrm. It works in the report, but not when trying to use it in my presentation. This is a ...
199 views

### How can I make a math operator symbol be bigger in display math?

I have an operator $\boxplus$ that works on an indexed collection of arguments, similar to $\sum$ or $\prod$ or $\bigoplus$. The following makes the index ranges typeset nicely: \usepackage{amsopn} \...
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### Vector Arrow Weirdness

Here's something strange: \documentclass[letterpaper]{amsart} \usepackage{amsmath} \usepackage{amsfonts} \usepackage{gensymb} \DeclareMathOperator{\Vi}{\vec{i}} \begin{document} $\Vi$ $\vec{i}$ \end{...
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### How to get limits aligned?

Assume the following MWE/Screenshot. How to get the "limits" x and y correctly vertically aligned? I tried already: \mathstrut and \vphantom{g} as discussed in How to align limits of double integrals?...
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### How I use LaTeX to write limit equations?

How can I use LaTeX code to write limit equations? I am mainly facing at the point where I am to assign the "x tends to" part.
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### How to have Ran(A) in math mode? [duplicate]

Code \documentclass{article} \usepackage[T1]{fontenc} \usepackage{amsmath, amsthm, amssymb} \begin{document} $\ker(A)$ works! $\ran(A)$ does not work. \end{document} How can you have the Ran(A) in ...
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### Declare a flexible math operator (such as expectation operator)

I would like to define a math operator, such as the expectation operator, which will be able to optionally receive subscript and/or superscript. Currently what I have is \newcommand{\E}[1]{\mathbb{E}...
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### How to express 1+3+5+7+9 in sum notation

I want to use \sum to express 1 + 3 + 5 + 7 ... + 2n - 1. Can I? Or what methods can I use to express this sequence?
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I always define my math operators by using \DeclareMathOperator from the package amsmath. The problem is that let say I use my operator already defined as \Op then when I write the instruction $\Op x^... 0answers 35 views ### Character with indexes on every corner [duplicate] I want to write characters in latex with indexes in every corner. For example to write a transformationmatrix from the basis B to the basis B' i need smth like this: https://de.wikipedia.org/wiki/... 3answers 127 views ### \sum-like command with subscripts both below and next to it In http://tex.stackexchange.com/a/89448/37686, the last option given (with E = ...) produces a sum-like expression which I am looking to reproduce. How can I define a command (\sumn, say) which ... 1answer 387 views ### Integral symbol in Lyx yields errors I get errors when trying to use the integral math symbol in Lyx document using the report class. I am usig LyX Version 2.1.3. Code and errors below: #LyX 2.1 created this file. For more info see ... 2answers 1k views ### is there a way to write −= as one symbol in formulas In programming -=, += and other similar operators are quite popular. But I am unable to write such operator nicely in Latex equations. For example when I use x += \frac{\partial C}{\partial x} I get ... 2answers 166 views ### Need the help for$ \large \sqsubset $and$\large \sqsupset $I need \sqsubset and \sqsupset in larger size. That means$ \sqsubset G_n \sqsupset $for the purpose of completely lies in side the text within the interval of that open and closed space. 1answer 30 views ### Is there a way to use commands like \equiv without declaring a function? I just want to add \equiv to my sentence but I keep getting an error when trying to compile in texmaker. Seems like what I need to do is wrap it in but I don't want to treat it as ... 0answers 36 views ### How to type the number of combinations with repetitions? [duplicate] For the number of combinations with repetitions a symbol similar to the binomial coefficient is used with additional parentheses: What would be the proper way how to type the symbol in LaTeX? I was ... 0answers 112 views ### Accented math operator I have this MWE \documentclass[a4paper, 12pt]{article} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage{lmodern} \usepackage{mathtools} \DeclareMathOperator{\shift}{décalage} \... 1answer 171 views ### Is there a right way to provide an empty operand to an equals sign? Imagine you intend to have "x=" in your document, followed by something that cannot be rendered in math mode, nor within some sort of box within math mode. Is there a preferred way to treat the right ... 2answers 433 views ### Replace all instances of * with \cdot only in mathmode As i understand the most accepted form to write the multiplication symbol in LaTeX in \cdot. However i have a rather large document already with * as the multiplication operator. I would like to ... 1answer 306 views ### Operators with subscripts, superscripts, and accents In mathematics, the tensor product between two vector spaces U and V is often notated U ⊗K V, if the scalar field is called K. This is usually typed in TeX like U\otimes_K V. I wonder if this is ... 1answer 6k views ### e^{…} vs \exp(…) in display mode In terms of readability as well as correct syntax, what is more preferred in mathematical equations: e^{...} or \exp(...) -- and why? For instance, e^{x^2/(4t)} or \exp(x^2/(4t)). The latter is ... 1answer 285 views ### How to use only selected math symbols of the STIX fonts? After reading an article by Grätzer in the current AMS-Notices on the STIX fonts, I wanted to use one of the math symbols in the article I am currently writing. In perfect naivety I did what was ... 1answer 93 views ### how to get this symbol with Latex? [duplicate] here is the picture of this symbol: How should I do to get it in math-mode? Thanks. 1answer 149 views ### operatorname does not work for Greek capitals in Beamer with T1 font encoding I cannot define operatorname for \Delta when line \usepackage[T1]{fontenc} is added into preamble. For \delta or without T1 things seem to work properly. But for the following example I get ‘´ d’ ... 3answers 13k views ### How do you create a set in LateX? I am very lost. I haven't been liking LaTeX as it's quite hard for me to get the hang of it, so I've decided to practice on my own during the summer, but I am already stuck on something that seems ... 0answers 33 views ### Problem with math \complement, MinionPro and Mnsymbol packages I have a problem with \complement command. Instead the expect output for this command appears the output for \lcirclerightint. I'm usign MinionPro packages which loads automatically MnSymbol. I ... 0answers 25 views ### Is there a built-in command like \sin except for curl? [duplicate] I know that we can write \sin x to get a non-italic sin. I would have expected there to be a similar command for curl, so I could write \curl \mathbf{F}. Is there such a command, or should I define my ... 1answer 155 views ### \DeclareSymbolFont undesired effect I would like to have math operator names in Sans Serif. \DeclareSymbolFont{operators}{OT1}{cmss}{m}{n} does the job but has also an effect on Greek capitals. How do I change font for operator names ... 2answers 260 views ### How do I make a$\sigma$the same size as an uppercase$\sum$with a symbol or letter in the center of the hole of the$\sigma\$?

I am a bit too new to figure out how to simultaneously make something that looks like this: \sum_a^b but instead is a lowercase \sigma that has been enlarged so that I can write a little letter ...
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### Wick contraction on boldface symbols

How can I Wick contract boldface letters? I am currently using the wick.sty package but it does not allow either {\bf X} nor {\bf X} to be Wick contracted against anything else. Is there some way ...
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### Conditional branch with \ifinner and Spacing in higher derivative (2 independent questions) [duplicate]

I made some macros shown below, which outputs ordinary/partial derivative. I was checking whether they work as I expected, and found that \dif{y}{x} expands to \tfrac{\difd y}{\difd x} in align ...
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### Eulerian polynomials of the second kind with \genfrac?

The Eulerian polynomials of the second kind are defined as (see for example here) E_n(x) = \sum_{m\ge0} \left\langle\!\!\left\langle n\atop m\right\rangle\!\!\right\rangle x^m . I would like to ...
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### Standard for typesetting mathematical objects other than variables

Is there a standard in mathematics for typesetting the textual (not symbolic) identifiers of mathematical objects other than variables? Textual identifiers of mathematical objects other than ...
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### How to define d in integral expression for \int \dif x f(x) notation

There seems to be some consensus about defining \dif like this: \newcommand{\dif}{\mathop{}\!\mathrm{d}} Should I \mathrm the d in my integrals?, What is the difference of \mathop, \operatorname ...
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### Changing the operator font with unicode-math loaded

How could I change the operator font to, let's say, the sans serif style, with the unicode-math package loaded? The following code only works without that package: \documentclass{article} %\...
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### How to type this math symbol? [duplicate]

I've got to type this symbol in my article. I've searched through Internet but haven't seen anything about how to write it in TeX command. It is perhaps rarely seen or used. But I really need to use ...
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### How do I write a multi row single column (or multiple columns) equation?

\documentclass[a4paper,12pt,numbers=noenddot]{scrartcl} \usepackage{mathtools} \usepackage{bm} \begin{document} \nabla_Q N_I = \{{N_{I,1}} \\ {N_{I,2}} \\ {N_{I,3}}\} = J_{e}^{-T}\{...
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### How to indent the equation number to the right?

\documentclass[a4paper,12pt,numbers=noenddot]{scrartcl} \usepackage{mathtools} \usepackage{amsmath} \begin{document} \delta{\mathbf{E_e} = \sum \limits_{I=1}^{M} \emph{B}_{LI} \...
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### How do I place the argument of “min” below rather than to the side?

\documentclass[a4paper,12pt,numbers=noenddot]{scrartcl} \usepackage{mathtools} \usepackage{amsmath} \usepackage{amssymb} \usepackage{bm} \begin{document} ||\mathbf{x}^{1} - \bar{...
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### How do I reduce the space between operators in math mode? [duplicate]

I have these operators +=, -= etc. in Math mode. LaTeX introduces space around single character operators. So I get + = and - = instead. However, in my case I want no space between the + and the =, ...
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### Compilation error with \ifnum in ConTeXt

Why the following code gives me the following error? Code: \begingroup \catcode\"=12 \gdef\newmcodes@{\mathcode\'39\mathcode\*42\mathcode\."613A% \ifnum\mathcode`\-=45 \else \...
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### Large Brackets Make Line Breaks too Small

\documentclass[10pt,letterpaper]{article} \usepackage[utf8]{inputenc} \usepackage{mathtools} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{parskip} \usepackage[left=2cm,right=2cm,top=2cm,...
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### Writing limits of integration [duplicate]

I'm not sure exactly what it's called, but I would like to draw the line after an integral has been "solved," showing limits of integration, like so: There is a line with a 9 above and 1 below.
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### Bigcup, bigwedge etc. inside brackets gets space above

I want to have the following formula: $\Phi=\{\phi\}\cup\left\{\exists \mathsf{x_0}\ldots\exists \mathsf{x_{n-1}}\left[\bigwedge_{0\leq i<j\leq n-1} \mathsf{x_i}\neq\mathsf{x_j}\right]\right\}$ ...
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### How to correctly write +: R × R → R?

When viewing addition on (say) a ring R as a map R × R → R, one often writes something like {+}\colon R\times R\to R. However, I assume that perhaps \mathord+\colon R\times R\to R is more ...
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### Aligned underbraces between amsmath equations

I have an \amsmath aligned environment containing some equations aligned with &=. I want to be able to place underbraces between the equations in such a way that that both the contents and “point” ...
1k views

### Trigonometric function script? [duplicate]

Is there a script for the sinc function analogous to \sin for sinus? If not, what method should I use to insert it in a equation?
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### Equation and math system on same line

To add a math system into a LaTeX document, I add to preambol \newenvironment{sistema}% {\left\lbrace\begin{array}{@{}l@{}}}% {\end{array}\right.} then in the document I do something like \[\begin{...