A and B are open subsets of X with Cl(A) = X = Cl(B).
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.3: Subgroups
Problem 23E: 23. Let be the equivalence relation on defined by if and only if there exists an element in ...
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Let X be a topological space. Suppose that A and B are open subsets of X with Cl(A) = X = Cl(B). Prove that Cl(A ∩ B) = X.
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