# Tagged Questions

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

31 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 ...
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 ...
34 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.
20 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 ...
31 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 ...
35 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} ...
152 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 ...
359 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 ...
212 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 ...
184 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 ...
84 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 ...
55 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.
61 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’ ...
413 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 ...
22 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 ...
32 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 ...
82 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 to 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 ...
70 views

### How to write a definite integral in latex?

And also how to edit the differential ? And how to put a summatory ?
34 views

### 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 ...
37 views

### 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 ...
36 views

### 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 ...
132 views

### 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 ...
43 views

### 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 ...
55 views

### 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} ...
49 views

### 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 ...
51 views

### 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}}\} = ...
36 views

### 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} ...
143 views

### 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} - ...
51 views

### 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 =, ...
68 views

### 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 ...
32 views

### Large Brackets Make Line Breaks too Small

\documentclass[10pt,letterpaper]{article} \usepackage[utf8]{inputenc} \usepackage{mathtools} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{parskip} ...
107 views

### 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.
60 views

### Bigcup, bigwedge etc. inside brackets gets space above

I want to have the following formula: $\Phi=\{\phi\}\cup\left\{\exists \mathsf{x_0}\ldots\exists \mathsf{x_{n-1}}\left[\bigwedge_{0\leq i<j\leq n-1} \mathsf{x_i}\neq\mathsf{x_j}\right]\right\}$ ...
2k views

### 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 ...
125 views

### 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” ...
125 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?
52 views

### 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 ...
281 views

### Nested Summation

Using below code i am getting result shown in below image but its not properly displayed for ex space on either side of =. First summation sign is small. Brackets ( ) are small. All items are not ...
230 views

### Symbol inbetween “#” and “ff”

I wondered how to create a symbol that looks like "#" (for connected sum) and "ff" for "fiber". The size and angles should be like the "#", but the vertical bars should look like two fs. Another way ...
497 views

### \wedge and \vee juxtaposed in one symbol

How can I combine the symbols \wedge and \vee into one symbol, like \wedge\vee and \vee\wedge? I am thinking of something like \gtrless but rotated by 90 degrees. The purpose is similar to the \pm ...
137 views

### \scriptstyle placement fine tuning

I need a functional composition operator. I find \circ too big for it, so I've declared a math operator (within the amsart documentclass) as \scriptstyle\circ instead; the size is exactly what I would ...
61 views

### Hyperbolic functions both produce error and result already existant when inserted in preamble

I'm trying to write hyperbolic functions like sech, csch, etc, Since amsmath doesn't recognize them in the form \sech, \csch, ... I wrote a preamble like \DeclareMathOperator{\sech}{sech} but I get ...
183 views

### Undefined control sequence for beta symbol list

I am new to Latex, please help me! I would like to give a beta symbol with a sequence of values as below. \boldsymbol{\beta} = (\beta_1,\beta_2,\dotsc,\beta_n) output looks promising. β = (β1, ...
83 views

### cup with a dot in it - but in mathjax! [closed]

Looking for solutions I have found that there are 3 ways, all can be found here Is a cupdot symbol available in amsmath? It seems that those answers are just copied and pasted all over the internet ...
157 views

### A hack for getting a *capital* Weierstrass P in order to represent the Power Set operation [closed]

I've been reading around stack exchange trying to find out how to get the symbol I wanted for the power set operation in set theory. In my opinion, the best and most standard symbol for this is the ...
81 views

### Write text (or symbol) vertically below another symbol in latex

I have to write some equations in latex, my Latex equation: \begin{align} G _{a_{1},\ldots ,a_{k}}\ast_{b_{1},\ldots ,b_{k}} G^{\prime }=G^{\prime \prime } \end{align} How can I make the text ...
145 views

### How do I modify the size of S the summation operand?

I bet this fancy summation operand S is in fact $\mathcal{S}$, am I right? But how do I modify the size of this thingy? \bigg or \left\right doesn't seem to work... And something like this: ...
64 views

### framed package change math?

This code : \documentclass{article} %\usepackage{framed} \begin{document} bla bla bla $\cap_{i\in I} X_i.$ \end{document} produces : and the same code with the line \usepackage{framed} ...