List questions from cofibrations

Published on 23 Nov 2023 - 17:55

86

Views

Show that if $A$ is contractible and $i:A \to X$ is a cofibration, then there exists a retraction from $X$ onto $A$.

Published on 16 Dec 2023 - 17:02

68

Views

Lifting property of Serre fibration that is weak equivalence

Published on 22 Jan 2024 - 16:16

30

Views

When will a cofibration be a principal cofibration?

Published on 04 Mar 2024 - 3:23

48

Views

How to understand cofibration as a commutative diagram?

Published on 05 Mar 2024 - 1:05

76

Views

Comparing the definition of a cone from Wikipedia and from Marty Arkowitz.

Published on 13 Aug 2020 - 14:17

546

Views

Understanding some steps in the proof that the inclusion map of a space into the cone of that space is a cofibration.

Published on 13 Aug 2020 - 22:17

162

Views

Why the map of the pushout of the cone is taken from $X$ to $*$?

Published on 14 Aug 2020 - 19:26

48

Views

Why we are sure that $h^{'} $ is a homeomorphism?

Published on 15 Aug 2020 - 1:04

42

Views

Induced map in model categories

Published on 23 Aug 2020 - 17:36

54

Views

Model categories: $\text{Ho}$ and $\cal C_{cf}/\sim$

Published on 06 Sep 2020 - 15:48

115

Views

Homotopy on $S^{n-1}$ extends to homotopy on $D^n$

Published on 02 Nov 2020 - 16:33

209

Views

generalization of fibration

Published on 09 Nov 2020 - 7:19

62

Views

Showing that homotopy and homology groups of $X=\{0\}\cup\{1/n\}$ and $Y=\{1/n\}$ are isomorphic.

Published on 14 Apr 2021 - 12:16

48

Views

Arrow category $\cal K^\to$

Published on 28 Apr 2021 - 20:09

List Question

Good pair and G-delta vs cofibration

Show that if $A$ is contractible and $i:A \to X$ is a cofibration, then there exists a retraction from $X$ onto $A$.

Lifting property of Serre fibration that is weak equivalence

When will a cofibration be a principal cofibration?

How to understand cofibration as a commutative diagram?

Comparing the definition of a cone from Wikipedia and from Marty Arkowitz.

Understanding some steps in the proof that the inclusion map of a space into the cone of that space is a cofibration.

Why the map of the pushout of the cone is taken from $X$ to $*$?

Why we are sure that $h^{'} $ is a homeomorphism?

Induced map in model categories

Model categories: $\text{Ho}$ and $\cal C_{cf}/\sim$

Homotopy on $S^{n-1}$ extends to homotopy on $D^n$

generalization of fibration

Showing that homotopy and homology groups of $X=\{0\}\cup\{1/n\}$ and $Y=\{1/n\}$ are isomorphic.

Arrow category $\cal K^\to$

Trending Questions

Popular # Hahtags

Popular Questions