User mme

147 votes

10 answers

16k views

What non-categorical applications are there of homotopical algebra?

asked Jun 6, 2014 at 6:50

73 votes

1 answer

3k views

Does $\Bbb{CP}^{2n} \# \Bbb{CP}^{2n}$ ever support an almost complex structure?

asked Sep 2, 2015 at 20:03

23 votes

2 answers

850 views

Classification of fake (quaternionic, octonionic) projective spaces

asked May 14, 2016 at 0:44

23 votes

1 answer

1k views

What motivated Rademacher's contour along the Ford circles?

asked Nov 17, 2013 at 4:54

21 votes

0 answers

776 views

Is the mapping class group of $\Bbb{CP}^n$ known?

asked Dec 29, 2019 at 15:40

16 votes

0 answers

437 views

Survey of known results on equivariant transversality

asked Jan 16, 2016 at 2:07

14 votes

0 answers

338 views

Are there Alexander-Whitney maps in geometric homology?

asked Sep 8, 2017 at 1:15

13 votes

0 answers

475 views

Singular cohomology of $BG$ and Borel cohomology of $G$

asked Dec 2, 2014 at 6:01

10 votes

0 answers

187 views

A minimal $\mathbb Z/2$-invariant Morse function on $U(n)$

asked Aug 16, 2021 at 17:48

6 votes

0 answers

133 views

What is the monoid of skew-symmetric trilinear forms on finite abelian groups?

asked Apr 9, 2018 at 20:58

5 votes

1 answer

830 views

Why does the Gluck twist on a spun knot give the standard $S^4$?

asked Mar 12, 2015 at 21:07

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11 Questions

What non-categorical applications are there of homotopical algebra?

Does $\Bbb{CP}^{2n} \# \Bbb{CP}^{2n}$ ever support an almost complex structure?

Classification of fake (quaternionic, octonionic) projective spaces

What motivated Rademacher's contour along the Ford circles?

Is the mapping class group of $\Bbb{CP}^n$ known?

Survey of known results on equivariant transversality

Are there Alexander-Whitney maps in geometric homology?

Singular cohomology of $BG$ and Borel cohomology of $G$

A minimal $\mathbb Z/2$-invariant Morse function on $U(n)$

What is the monoid of skew-symmetric trilinear forms on finite abelian groups?

Why does the Gluck twist on a spun knot give the standard $S^4$?