I am have run into a problem where I am supposed to prove that for any set A, the boundary of A is a closed set and that for any set A, the boundary of A is a subset of A closure.

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- February 8th 2013, 03:44 PMkaptain483Interior and Closure for TOPOLGY
I am have run into a problem where I am supposed to prove that for any set A, the boundary of A is a closed set and that for any set A, the boundary of A is a subset of A closure.

- February 8th 2013, 03:56 PMPlatoRe: Interior and Closure for TOPOLGY
- February 10th 2013, 07:52 PMkaptain483Re: Interior and Closure for TOPOLGY
how do you show that they are pair wise disjoint sets

- February 10th 2013, 08:14 PMPlatoRe: Interior and Closure for TOPOLGY