Prove that if a set contains each of its accumulation points, then it must be a closed set.

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- Feb 4th 2010, 12:12 PMLCopper2010Complex Variables
Prove that if a set contains each of its accumulation points, then it must be a closed set.

- Feb 4th 2010, 12:57 PMPlato
- Feb 5th 2010, 05:12 AMHallsofIvy
What does this have to do with complex variables?