User Nicolas Boerger

25 votes

3 answers

2k views

Hermann Weyl's work on combinatorial topology and Kirchhoff's current law in Spanish

asked Oct 2, 2017 at 16:26

19 votes

1 answer

708 views

Digitalized version of "Cours de topologie algébrique professé en captivité"

asked May 20, 2020 at 16:45

12 votes

2 answers

467 views

Example of a finite group $G$ with low dimensional cohomology not generated by Stiefel-Whitney classes of flat vector bundles over $BG$

asked Feb 12, 2019 at 1:49

11 votes

1 answer

222 views

Reference requests: Integral cohomology of $G_2$-homogeneous spaces

asked Apr 21, 2019 at 22:19

10 votes

1 answer

1k views

Acyclic Finite Groups

asked Jan 30, 2018 at 22:25

10 votes

1 answer

988 views

Status of Zeeman's collapsability Conjecture

asked Nov 3, 2015 at 14:34

10 votes

0 answers

372 views

Steenrod Problem and realization of rational homology classes by manifolds

asked Feb 8, 2017 at 19:13

9 votes

1 answer

435 views

Atiyah Bott-Shapiro orientation Vs Anderson-Brown-Peterson Splitting

asked Feb 2, 2018 at 1:53

9 votes

1 answer

305 views

Topological Spin manifolds in dimension 4

asked Nov 2, 2019 at 22:24

8 votes

1 answer

368 views

Morse Theory and proper actions

asked Mar 17, 2014 at 16:21

7 votes

1 answer

414 views

Reference request: mod 2 cohomology of periodic KO theory

asked Jul 24, 2019 at 16:32

7 votes

1 answer

223 views

Five-dimensional manifolds fibering over a fixed hyperbolic surface

asked Jun 12, 2018 at 18:53

6 votes

1 answer

142 views

Example of nonvanishing Waldhausen Nil group

asked Oct 29, 2018 at 19:28

6 votes

1 answer

467 views

Amenability as a geometric property

asked Sep 8, 2014 at 15:22

6 votes

1 answer

405 views

Differential of homological atiyah-Hirzebruch Spectral sequence for K-homology

asked Nov 6, 2014 at 22:15

5 votes

1 answer

207 views

homological 2 dimensional groups

asked Jan 6, 2016 at 22:21

5 votes

0 answers

148 views

Higher homotopy groups and ramified covering maps [duplicate]

asked Jan 10, 2018 at 16:22

4 votes

1 answer

119 views

Enumeration of three dimensional spherical good orbifolds covered by Nil, sol and E3

asked Jan 10, 2018 at 16:56

4 votes

0 answers

152 views

Character Theory for quaternionic representations of finite groups

asked Jan 20, 2017 at 19:44

4 votes

0 answers

128 views

Spin bordism with non free involution

asked Oct 12, 2016 at 15:05

4 votes

1 answer

339 views

Ends of Coxeter Groups

asked Sep 10, 2014 at 14:46

4 votes

0 answers

261 views

Bordism and complex $K$-theory

asked Feb 3, 2014 at 13:58

3 votes

1 answer

194 views

Local cross sections for Unitary group in a hilbert space

asked Feb 25, 2013 at 15:06

3 votes

2 answers

202 views

f vectors of simplicial complexes homeomorphic to n dimensional spheres

asked Dec 7, 2015 at 16:53

3 votes

1 answer

331 views

Reduced Vs unreduced cohomology in the parametrized setting.

asked Jan 11, 2017 at 15:18

3 votes

2 answers

826 views

Reference for de Rham cohomology for physicists

asked May 16, 2017 at 16:18

3 votes

0 answers

189 views

Reference request :Conjugation action in the mod 2 cohomology of Integral Eilenberg Maclane spectrum

asked Aug 23, 2019 at 21:09

3 votes

0 answers

147 views

Extensive survey of computations of equivariant stable stems

asked Jun 17, 2019 at 17:41

3 votes

0 answers

85 views

Reference Request: Equivariant Symplectic bordism

asked Aug 24, 2018 at 21:20

3 votes

0 answers

128 views

Salvetti complexes and cohomology of affine completion of Artin groups $E_6$ and $E_7$

asked Feb 4, 2022 at 13:16

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45 Questions

Hermann Weyl's work on combinatorial topology and Kirchhoff's current law in Spanish

Digitalized version of "Cours de topologie algébrique professé en captivité"

Example of a finite group $G$ with low dimensional cohomology not generated by Stiefel-Whitney classes of flat vector bundles over $BG$

Reference requests: Integral cohomology of $G_2$-homogeneous spaces

Acyclic Finite Groups

Status of Zeeman's collapsability Conjecture

Steenrod Problem and realization of rational homology classes by manifolds

Atiyah Bott-Shapiro orientation Vs Anderson-Brown-Peterson Splitting

Topological Spin manifolds in dimension 4

Morse Theory and proper actions

Reference request: mod 2 cohomology of periodic KO theory

Five-dimensional manifolds fibering over a fixed hyperbolic surface

Example of nonvanishing Waldhausen Nil group

Amenability as a geometric property

Differential of homological atiyah-Hirzebruch Spectral sequence for K-homology

homological 2 dimensional groups

Higher homotopy groups and ramified covering maps [duplicate]

Enumeration of three dimensional spherical good orbifolds covered by Nil, sol and E3

Character Theory for quaternionic representations of finite groups

Spin bordism with non free involution

Ends of Coxeter Groups

Bordism and complex $K$-theory

Local cross sections for Unitary group in a hilbert space

f vectors of simplicial complexes homeomorphic to n dimensional spheres

Reduced Vs unreduced cohomology in the parametrized setting.

Reference for de Rham cohomology for physicists

Reference request :Conjugation action in the mod 2 cohomology of Integral Eilenberg Maclane spectrum

Extensive survey of computations of equivariant stable stems

Reference Request: Equivariant Symplectic bordism

Salvetti complexes and cohomology of affine completion of Artin groups $E_6$ and $E_7$