Suppose that E Rn and that f: E Rm. a) Prove that f is continuous
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a) Prove that f is continuous on E if and only if f-1(B) is relatively closed in E for every closed subset B of Rm.
b) Suppose that f is continuous on E. Prove that if V is relatively open in f(E), then f-l (V) is relatively open in E, and if B is relatively closed in f(E), then f-l(B) is relatively closed in E.
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a By Exercise 838b a set E is relatively open in some set B if and only if its complement ...View the full answer
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