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OpenStudy (anonymous):
what is the cardinality of the empty set?
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jimthompson5910 (jim_thompson5910):
zero, because there's nothing in it http://math.stackexchange.com/questions/930848/why-does-the-empty-set-have-a-cardinality-of-zero
OpenStudy (anonymous):
thank you just wanted to see if the site works ...is it possible to explain proof by case?
jimthompson5910 (jim_thompson5910):
idk if this works (probably a lousy proof?) https://proofwiki.org/wiki/Cardinality_of_Empty_Set
jimthompson5910 (jim_thompson5910):
it's just a definition thing really
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