List questions from algebraic-topology

Published on 25 Mar 2026 - 15:59

195

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$i$ is a cofibration then $1 \times i : B \times A \rightarrow B \times X$ is cofibration

Published on 31 Mar 2026 - 5:50

350

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Differences in Homology/Cohomology of a CW Pair (X,A) when A is empty versus a point

Published on 30 Mar 2026 - 5:13

201

Views

When the primary obstruction is the only obstruction, is it still the only obstruction after a pull-back?

Published on 23 Mar 2026 - 7:01

445

Views

Algebraic topology on locales

Published on 30 Mar 2026 - 11:54

482

Views

Characteristic classes of spinor bundle

Published on 27 Mar 2026 - 9:54

89

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Folitaion of $\mathbb R^n$ by compact leaves

Published on 25 Mar 2026 - 9:31

557

Views

Construction of a cohomology theory from a given spectrum.

Published on 06 Jul 2018 - 10:05

1.5k

Views

Covering spaces of $\mathbb{C}^{\times}$

Published on 25 Mar 2026 - 12:53

190

Views

free $G$-action on a topological space

Published on 25 Mar 2026 - 13:54

442

Views

cohomology of $\mathbb{CP}^n$ and $\mathbb{RP}^m$

Published on 25 Mar 2026 - 9:27

902

Views

$2$-torsion subgroup of $M$ v.s. $M/(2M)$

Published on 30 Mar 2026 - 22:39

528

Views

Topology of "degenerate spectrum submanifold" in the space of hermitian matrices

Published on 25 Mar 2026 - 7:45

149

Views

What are some applications of graph theory to topology?

Published on 31 Mar 2026 - 22:51

369

Views

Hausdorff covering space of a quotient

Published on 25 Mar 2026 - 12:54

List Question

Covering space born from covering spaces

$i$ is a cofibration then $1 \times i : B \times A \rightarrow B \times X$ is cofibration

Differences in Homology/Cohomology of a CW Pair (X,A) when A is empty versus a point

When the primary obstruction is the only obstruction, is it still the only obstruction after a pull-back?

Algebraic topology on locales

Characteristic classes of spinor bundle

Folitaion of $\mathbb R^n$ by compact leaves

Construction of a cohomology theory from a given spectrum.

Covering spaces of $\mathbb{C}^{\times}$

free $G$-action on a topological space

cohomology of $\mathbb{CP}^n$ and $\mathbb{RP}^m$

$2$-torsion subgroup of $M$ v.s. $M/(2M)$

Topology of "degenerate spectrum submanifold" in the space of hermitian matrices

What are some applications of graph theory to topology?

Hausdorff covering space of a quotient

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