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单词 Zorn's lemma
释义 Zorn's lemma
 /zawrnz/, Math.
 a 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.
 [1945-50; after Max August Zorn (born 1906), German mathematician]
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