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memolee
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Homework Statement
Prove or disprove the following statement:
The closure of a set S is closed.
Homework Equations
Definition of closure: set T is the closure of set S means that T is the union of S and the set of limit points of S.
Definition of a closed set: set S is closed means that if p is a limit point of S then p is in S.
The Attempt at a Solution
So, the closure of set S-- call it set T-- contains all the elements of S and also all the limit points of S. Then, T must have limit points that is contained in it.
I can't prove that all the limit points of T is in T. I can only prove that all the limit points of S is in T. Help?