# absolute value

## Primary tabs

Type of Math Object:
Definition
Major Section:
Reference
Groups audience:

## Mathematics Subject Classification

13-00 General reference works (handbooks, dictionaries, bibliographies, etc.)
11A15 Power residues, reciprocity

### gets

What's with the "gets" notation (:=) ?

-apk

### Re: gets

I use := for "equal by definition" and = for "equal, but the two sides have independent definitions and the fact that they are equal is an assertion".

Mathematica, Maple, and Matlab, and many professors here all use the same convention, so it is not all that weird in any way. C and perl use = for my := and == for my =, but I find that this usage is not general.

drummond says that engineers use a three-bar equals (the \equiv symbol in TeX) for my :=, but I have not seen this usage outside of engineering.