# Difference between revisions of "Cartesian product"

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(lol, how about defective product?) |
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## Latest revision as of 03:53, 22 August 2010

The **Cartesian product** of two sets *A* and *B* is the set (usually denoted by *A × B*) consisting of all ordered pairs *(a, b)* where and . The Cartesian product is named after René Descartes, who invented this concept.

A common example of a Cartesian product is the coordinate plane, . This is all ordered pairs *(a,b)* of real numbers *a* and *b*. It is used for graphing functions on the real numbers.