Linked Questions

41
votes
4answers
101k 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 ...
8
votes
4answers
3k views

Most Efficient Way of Creating Left Aligned Item/Equation List

What is the best way to achieve a list where items are seamlessly aligned either left, centered, or right. I am more so interested in the items being left aligned, (for instance a series or (system) ...
7
votes
4answers
496 views

Align $:=$ with $=$ in align/split mode

I am writing a sequence of inequalities in math mode, where the first line defines the first object. To be clear, I have something like \documentclass[12pt]{amsart} \usepackage{amsfonts,graphics,...
8
votes
3answers
44k views

Symbol for definition := [duplicate]

Sometimes the symbol := is used to denote a definition. For example, X:=Y+Z means that X is defined to be Y+Z. When using LaTeX, can I just use $:=$, or do I need to do something special?
14
votes
2answers
5k views

Exchange meaning of : and \colon

I usually use the colon symbol : to denote maps. For set syntax there is the braket package. So as the spacing of : is not appropriate, I want it to behave like \colon. I tried \documentclass{article}...
12
votes
2answers
863 views

What is the purpose of : in math mode?

What is the purpose of $:$? We know that in math mode one should write in natural language and not being so strict with math notation. For example: $f:A\to B$ is not "correct", the correct way would ...
1
vote
2answers
104 views

Typesetting displayed equivalences and definitions of unequal length

What is the proper way to typeset in LaTeX, in display-mode, a series of equivalences and definitions of unequal lengths of sets ? Consider for this the following code that I used for a series of ...
9
votes
1answer
9k views

Missing } inserted, yet braces are balanced

Regard the following document: \documentclass[a4paper,reqno]{amsart} \usepackage{amssymb,amsmath,amsthm,fullpage} \begin{document} For each $k$ we denote by $\lambda_k$ the $k$th symmetric ...
2
votes
1answer
1k views

mathtools' \vcentcolon and fourier's utopia

The mathtools package has a centered colon, \vcentcolon, which is used to display the definition symbol := correctly. However when using the fourier package, I get the following output from $:\...
2
votes
1answer
4k views

Positioning of equations

I am trying to position my equations as in the image below, but I cant seem to get it to work (mainly because I cant get the line breaks to work). How would I position my equation like in the image ...
0
votes
1answer
112 views

Definitions in math formulas [duplicate]

I want to have definitions like $x :=1$ in my tex to look good, and to be really different from a statement of equality like $x = 1$. However, the $:$ and $=$ are not alligned, and this looks ugly. ...
6
votes
0answers
425 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 colon was ...
0
votes
0answers
291 views

How to typset $:\iff$ (logical equivalence)? [duplicate]

How shall I typeset ":<=>" in Latex which means "is logical equivalent"? After typing A :\iff B I get Comparing it with A \coloneqq B (cf. How to typeset $:=$ correctly? ): We see that there is a ...
0
votes
0answers
86 views

What is the right way to typeset “define”? [duplicate]

One often uses x:=t which reads "x is defined to be t". What is the right way to typeset this in LaTeX? Is it simply \(x := t\)? I tried to google it around but couldn't find anything (probably ...