# Difference between revisions of "Binary operation"

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In mathematics, a binary operation on a set is a function of two variables which assigns a value to any pair of elements of the set: principal motivating examples include the arithmetic and elementary algebraic operations of addition, subtraction, multiplication and division.

Formally, a binary operation  on a set S is a function on the Cartesian product

 given by 

using operator notation rather than functional notation, which would call for writing .

## Properties

A binary operation may satisfy further conditions.

Special elements which may be associated with a binary operation include: