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Unformatted text preview: Question 2. (a) Use the DeMorgan laws to argue that ( A ∩ B ) c = A c ∪ B c and ( A ∪ B ) c = A c ∩ B c . (b) Prove that the empty set is a subset of every set. 14 Math 413 Prepreliminaries...
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 Fall '11
 Wong
 Logic, Set Theory, Naive set theory, convergent sequences

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