Question

closed mapping defination​

Answer 1

In topology, an open map is a function between two topological spaces which maps open sets to open sets. That is, a function is open if for any open set U in X, the image is open in Y. Likewise, a closed map is a function which maps closed sets to closed sets.

Answer 2

a closed map is a function which maps closed sets to closed sets. A map may be open, closed, both, or neither; in particular, an open map need not be closed and vice versa.

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