User Oscar Randal-Williams

9 votes

Are finite $G$-spectra idempotent complete?

answered Mar 30, 2021 at 8:42

9 votes

Accepted

Remove a disc from a manifold. When is the resulting sphere nullhomotopic?

answered Sep 29, 2017 at 20:46

9 votes

Accepted

Intersection form of surface bundle over surface

answered Jul 20, 2020 at 20:43

9 votes

Accepted

Generalizing the Madsen-Weiss Theorem via the scanning map $\mathscr{C}(M,\mathbb{R}^{\infty})\to\Omega^{\infty}AG^+_{\infty,d}$

answered Aug 1, 2018 at 19:43

9 votes

Accepted

Counterexamples for strengthening Whitehead's theorem?

answered Jul 5, 2015 at 19:43

9 votes

Accepted

Calculate the group cohomology classes $H^d[U(1)\rtimes Z_2, Z]$ and $H^d[U(1)\rtimes Z_2, Z_T]$

answered Sep 16, 2011 at 8:24

9 votes

Accepted

Homology of loop space

answered Nov 17, 2011 at 8:45

9 votes

Conjuring phantoms by hand?

answered Sep 26, 2012 at 6:04

9 votes

Generalized notions of solutions in various areas of mathematics

answered Oct 7, 2010 at 18:16

8 votes

Accepted

Embeddings of vector spaces

answered Jun 17, 2011 at 6:19

8 votes

Fixed point of $S^1$-action using roots of unity

answered Jan 16, 2013 at 12:31

8 votes

Accepted

Topology of hypersurface of sphere fixed by homeomorphic involution

answered Jun 20, 2015 at 14:44

8 votes

Accepted

Is equivariant oriented cobordism finite?

answered Dec 21, 2016 at 15:34

8 votes

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Whitney sum formula for topological Pontryagin classes

answered May 22, 2020 at 7:05

8 votes

Accepted

Name for extension of the symplectic group

answered Oct 22, 2022 at 17:40

8 votes

Accepted

Is Morava K-theory of a classifying space of a compact Lie group a Noetherian ring?

answered Sep 12 at 9:04

7 votes

Chromatic orientability of manifolds

answered Jul 15, 2021 at 22:02

7 votes

Accepted

Detailed proof of $\mathfrak{s}^{-1}\mathrm{End}_V\cong \mathrm{End}_{\Sigma V}$

answered Jul 28, 2020 at 17:43

7 votes

Accepted

Mixed Hodge structure on configuration spaces

answered Aug 25, 2020 at 8:16

7 votes

Steenrod powers of Pontryagin classes

answered Jun 11, 2017 at 19:22

7 votes

Accepted

Is there a kind of Poincare duality for Borel equivariant cohomology?

answered Sep 14, 2018 at 9:04

7 votes

Extension of the group $Sp(2g,\mathbb{Z})$

answered Nov 12, 2014 at 7:58

7 votes

Accepted

The Image of the Mod 2 Homology of BSp in the Homology of BSO

answered Oct 25, 2013 at 13:01

7 votes

classifying space of linear embeddings

answered Feb 21, 2012 at 21:42

7 votes

Infinite loop space maps into or out of BAut(F_n)

answered Oct 21, 2010 at 6:27

7 votes

Connectivity after Geometric Realization?

answered Dec 4, 2009 at 20:31

6 votes

Homologically trivial submanifolds

answered Jun 10, 2010 at 16:05

6 votes

What are some examples of colorful language in serious mathematics papers?

answered Nov 21, 2010 at 21:31

6 votes

Accepted

a small question about group homology

answered Sep 13, 2010 at 14:33

6 votes

Is there Harer stability for moduli of curves with level structure?

answered Jan 18, 2011 at 14:58

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157 Answers

Are finite $G$-spectra idempotent complete?

Remove a disc from a manifold. When is the resulting sphere nullhomotopic?

Intersection form of surface bundle over surface

Generalizing the Madsen-Weiss Theorem via the scanning map $\mathscr{C}(M,\mathbb{R}^{\infty})\to\Omega^{\infty}AG^+_{\infty,d}$

Counterexamples for strengthening Whitehead's theorem?

Calculate the group cohomology classes $H^d[U(1)\rtimes Z_2, Z]$ and $H^d[U(1)\rtimes Z_2, Z_T]$

Homology of loop space

Conjuring phantoms by hand?

Generalized notions of solutions in various areas of mathematics

Embeddings of vector spaces

Fixed point of $S^1$-action using roots of unity

Topology of hypersurface of sphere fixed by homeomorphic involution

Is equivariant oriented cobordism finite?

Whitney sum formula for topological Pontryagin classes

Name for extension of the symplectic group

Is Morava K-theory of a classifying space of a compact Lie group a Noetherian ring?

Chromatic orientability of manifolds

Detailed proof of $\mathfrak{s}^{-1}\mathrm{End}_V\cong \mathrm{End}_{\Sigma V}$

Mixed Hodge structure on configuration spaces

Steenrod powers of Pontryagin classes

Is there a kind of Poincare duality for Borel equivariant cohomology?

Extension of the group $Sp(2g,\mathbb{Z})$

The Image of the Mod 2 Homology of BSp in the Homology of BSO

classifying space of linear embeddings

Infinite loop space maps into or out of BAut(F_n)

Connectivity after Geometric Realization?

Homologically trivial submanifolds

What are some examples of colorful language in serious mathematics papers?

a small question about group homology

Is there Harer stability for moduli of curves with level structure?