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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Mathematics The study of the properties of sets.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The mathematical theory of sets.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the branch of pure mathematics that deals with the nature and relations of sets


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