Show that .... are open maps (see attachment)© BrainMass Inc. brainmass.com September 21, 2018, 4:12 am ad1c9bdddf - https://brainmass.com/math/geometry-and-topology/open-maps-proofs-49369
Please see the attached file.
4. A map f: X->Y is said to be an open map if for every open set U of X , the set f(U) is open in Y. Prove that and are open maps.
Proof. By definition of ...
This is a proof regarding open maps.