Linked Questions

8
votes
3answers
45k 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?
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
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. ...
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 ...
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) ...
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 ...
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 ...
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,...
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 ...
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 $:\...
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 ...
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 ...