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Cartesian product

noun, Mathematics.
the collection of all ordered pairs of two given sets such that the first elements of the pairs are chosen from one set and the second elements from the other set: this procedure generalizes to an infinite number of sets.
Origin of Cartesian product
1955-60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for Cartesian product

Cartesian product

(maths, logic) the set of all ordered pairs of members of two given sets. The product A × B is the set of all pairs <a, b> where a is a member of A and b is a member of B Also called cross product
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Cartesian product in Technology
(After Renee Descartes, French philosper and mathematician) The Cartesian product of two sets A and B is the set
A x B = (a, b) | a in A, b in B.
I.e. the product set contains all possible combinations of one element from each set. The idea can be extended to products of any number of sets.
If we consider the elements in sets A and B as points along perpendicular axes in a two-dimensional space then the elements of the product are the "Cartesian coordinates" of points in that space.
See also tuple.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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