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well-ordering theorem

American

[wel-awr-der-ing] / ˈwɛlˈɔr dər ɪŋ /

noun

Mathematics.

the theorem of set theory that every set can be made a well-ordered set.

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.