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WordReference Random House Unabridged Dictionary of American English © 2024Zorn's′ lem′ma (zôrnz),USA pronunciation [Math.]- Mathematicsa theorem of set theory that if every totally ordered subset of a nonempty partially ordered set has an upper bound, then there is an element in the set such that the set contains no element greater than the specified given element.
- after Max August Zorn (born 1906), German mathematician 1945–50
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