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In: Advanced Math

suppose that for every pair of disjoint closed sets A and B of X there exist...

suppose that for every pair of disjoint closed sets A and B of X there exist a countinous function f:X-> {0,1} such that f(A)={0} and f(B)={1}. show one point set is closed in X.

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Colby Messinger answered 2 years ago
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