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📁 PerfectNumbers

Properties based on the sum-of-divisors function s(n), including perfect and multiperfect numbers, aliquot sequences, amicable pairs and sociable chains.

条目 (9+)

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Set Theory

http://plato.stanford.edu/entries/set-theory/

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Cantor's Theorem

http://platonicrealms.com/encyclopedia/Cantors-Theorem

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Programming with Sets

http://www.cs.nmsu.edu/~complog/sets/

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Bounded Set Theory

http://www.botik.ru/~logic/bst/bst.html

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A History of Set Theory

http://mathshistory.st-andrews.ac.uk/HistTopics/Beginnings_of_set_theory.html

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Infinite Ink: The Continuum Hypothesis, by Nancy McGough

http://www.ii.com/math/ch/

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Deiser, Oliver

http://www.aleph1.info/

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Gitik, Moti

http://www.math.tau.ac.il/~gitik/

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Gao, Su

http://www.math.unt.edu/~sgao/

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