List questions from open-map | MathQA

Is there a continuous open surjective map from the 2-sphere to the 2-torus?

Published on 07 Oct 2022 - 17:26

Is the expectation operator an open map?

Published on 09 Oct 2022 - 22:47

An application of open mapping theorem in linear algebra.

Published on 10 Oct 2022 - 6:23

Characterization of Continuous, Closed and Open maps

Published on 26 Mar 2026 - 9:37

Characterizing continuous, open and closed maps via interior and closure operators

Published on 26 Mar 2026 - 7:57

Continuos function- bounded function

Published on 07 Nov 2022 - 18:07

Continuous open image of locally compact space

Published on 23 Nov 2022 - 18:43

Does a bijection always generate a natural "induced" topology?

Published on 30 Nov 2022 - 1:11

Continuous injective function that fails to map open sets to open sets

Published on 20 Dec 2022 - 21:16

How can I show that $D:X\rightarrow Y, f\mapsto f'$ is an open map?

Published on 10 Jan 2023 - 14:55

A question about the proof of the open mapping theorem (2.11) in Walter Rudin's Functional Analysis

Published on 12 Jan 2023 - 8:41

Holomorphic functions are open mapping via inverse function theorem

Published on 18 Jan 2023 - 15:27