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opiates

Name: Anonymous 2010-09-20 14:59

opiates

Name: Anonymous 2010-09-20 22:46

opiates

Name: Anonymous 2010-11-26 5:34

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Name: Anonymous 2013-09-01 17:12


The notion of cardinality, as now understood, was formulated by Georg Cantor, the originator of set theory, in 1874–1884. Cardinality can be used to compare an aspect of finite sets; e.g. the sets {1,2,3} and {4,5,6} are not equal, but have the same cardinality, namely three (this is established by the existence of a one-to-one correspondence between the two sets; e.g. {1->4, 2->5, 3->6}).

Name: Anonymous 2013-09-01 19:29


This assumption gives rise to paradoxes, the simplest and best known of which are Russell's paradox and the Burali-Forti paradox. Axiomatic set theory was originally devised to rid set theory of such paradoxes.

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