Difference between revisions of "Open map"
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Latest revision as of 22:53, 22 February 2017
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Created quickly, just to document the concept
- A closed map is a thing too and is defined similarly.
Contents
[hide]Definition
Let (X,J) and (Y,K) be topological spaces and let f:X→Y be a map (not necessarily continuous - just a map between X and Y considered as sets), then we call f an open map if[1]:
