User user51223 - MathOverflow

user51223

Member for 9 years, 11 months
Last seen this week

20 Answers

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21 votes

Explicit isomorphism $\pi_{n+1}(\mathbb{RP}^n) \cong \pi_1(\mathbb{RP}^{n-1})$

answered Oct 17, 2019 at 8:21

12 votes

Great graduate courses that went online recently

answered Jan 12, 2021 at 12:08

10 votes

"Standard arguments" in Mahowald's eta_j paper

answered Dec 23, 2017 at 3:53

8 votes

The logic of Buddha: a formal approach

answered Jun 7, 2018 at 13:44

7 votes

Topological structure of SO(n) as a product

answered Oct 6, 2015 at 12:28

7 votes

Iterated free infinite loop spaces

answered Mar 24, 2019 at 2:37

6 votes

Accepted

the "Kahn-Priddy map" and "multiplicative $p$-local equivalence"

answered Nov 11, 2015 at 6:34

6 votes

Dyer-Lashof operations and the homology of GL_n

answered Apr 29, 2015 at 19:58

5 votes

Accepted

Homology $H_*(TOP, \mathbb{Z}_2)$ of the stable homeomorphism space

answered Mar 19, 2017 at 19:38

4 votes

Spectral sequences in algebraic topology

answered Mar 4, 2021 at 8:18

2 votes

Embeddings of fiber bundles

answered Sep 4, 2017 at 6:20

2 votes

Reference for push-pull formula in cohomology

answered Jul 23, 2016 at 9:13

2 votes

Reference for ring structure on Thom spectra

answered Aug 13, 2016 at 16:59

1 vote

The "right" topological spaces

answered Sep 1, 2016 at 15:02

1 vote

The Thom space of a Whitney sum of vector bundles

answered Apr 23, 2016 at 7:33

1 vote

Cohomology theories as colimits

answered Aug 25, 2017 at 4:05

1 vote

Unstable Greek letter elements

answered Dec 3, 2018 at 13:38

1 vote

Which stable homotopy groups are represented by parallelizable manifolds?

answered Jun 25, 2020 at 18:36

0 votes

Infinite loop spaces

answered Sep 1, 2016 at 15:17

-1 votes

Algebraic Geometry for Topologists

answered Jul 23, 2016 at 8:35