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Mesfer Alqahtan
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- Feb 28, 2013
- 3
Prove that X is T2 iff for each x belong to X, then the intersection{CL(U): U is a nhd of x }={x}.
Let X be a T2 space, Let x in X fixedProve that X is T2 iff for each x belong to X, then the intersection{CL(U): U is a nhd of x }={x}.