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In geometry, topology, and related branches of mathematics, a closed set is a set whose complement is an open set. In a topological space, a closed set can be defined as a set which contains all its limit points. In a complete metric space, a closed set is a set which is closed under the limit operation.
This should not be confused with a closed manifold.

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    15 gcash (CLOSED)

    Hidden content
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    Closed Closed thread

    as in?
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    Closed Ehi

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