List questions from closed-map

Published on 06 May 2019 - 22:23

57

Views

If $Tx=0$ is $T$ necessarily closed

Published on 21 Jul 2019 - 14:02

739

Views

Integral ring homomorphism implies induced map on spectra is closed

Published on 11 Sep 2019 - 10:43

73

Views

Proving $X$ is compact using a function $f\colon X \to Y$?

Published on 18 Oct 2019 - 21:18

35

Views

Regarding a problem related to projection map in functional analysis

Published on 04 Nov 2019 - 3:53

89

Views

$f\times\text{id}$ is closed for a closed map $f$ with $f^{-1}(y)$ compact $\forall y\in Y$

Published on 28 Nov 2019 - 14:47

134

Views

T is a closed map if dim(Y/T(X)) is finite

Published on 04 Jan 2020 - 22:45

57

Views

Is this a closed map?

Published on 24 Mar 2026 - 21:38

127

Views

Which one of the following implies the other?

Published on 31 Jan 2020 - 16:00

704

Views

Characterizations of continuous, closed, and open maps

Published on 07 Feb 2020 - 21:26

90

Views

Some questions regarding continuity and open and closed sets.

Published on 23 Mar 2020 - 6:58

65

Views

Why can the continuous function of a non compact set be compact

Published on 23 Mar 2020 - 7:42

197

Views

Is the one-point compactification terminal in the „category of compactifications“?

Published on 24 Mar 2026 - 4:42

54

Views

Prove Existence Periodic Solution Nonlinear Pendulum with Torque

Published on 07 Apr 2020 - 21:15

789

Views

A restriction of a closed map is a closed map?

Published on 08 Apr 2020 - 3:23

List Question

Closed maps with non-compact fibers

If $Tx=0$ is $T$ necessarily closed

Integral ring homomorphism implies induced map on spectra is closed

Proving $X$ is compact using a function $f\colon X \to Y$?

Regarding a problem related to projection map in functional analysis

$f\times\text{id}$ is closed for a closed map $f$ with $f^{-1}(y)$ compact $\forall y\in Y$

T is a closed map if dim(Y/T(X)) is finite

Is this a closed map?

Which one of the following implies the other?

Characterizations of continuous, closed, and open maps

Some questions regarding continuity and open and closed sets.

Why can the continuous function of a non compact set be compact

Is the one-point compactification terminal in the „category of compactifications“?

Prove Existence Periodic Solution Nonlinear Pendulum with Torque

A restriction of a closed map is a closed map?

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