Wikipedia 10K Redux by Reagle from Starling archive. Bugs abound!!!

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back to [[Mathematics]] -- [[Set Theory]]

If two sets, X and Y, are defined, then we can define the Cartesian product of the two sets, XY, as the set of ''ordered'' pairs with the first element of each pair selected from X and the second element selected from Y.

:XY = { | x belongs to X and y belongs to Y}

[[Dick Beldin]]