User Qiaochu Yuan

2 votes

A Dold-Thom style construction of a cohomology class from a sphere bundle

answered Feb 8, 2015 at 10:52

2 votes

Is there a nice choice-free argument to count the number of sublattices?

answered Feb 1, 2016 at 18:23

2 votes

Accepted

geometric intuition for A and A-transpose having the same eigenvalues

answered Jul 30, 2017 at 22:18

2 votes

Product decompositions and maps from product of initial object with itself

answered Aug 31, 2020 at 0:20

2 votes

Properties of matrix exponential without using Jordan normal forms

answered Dec 30, 2016 at 8:30

2 votes

Can you reconstruct a simplicial set from an $\infty$-groupoid?

answered Jul 26, 2016 at 18:15

2 votes

Morphisms between fundamental groups of Lie groups

answered Aug 31, 2016 at 18:30

2 votes

Are chain complexes over a field always injective?

answered Sep 9, 2016 at 22:11

2 votes

Probability theory without deductive closure

answered Apr 26, 2016 at 3:52

2 votes

Vanishing of Kahler differentials vs. surjective Frobenius?

answered Jun 7, 2016 at 6:55

2 votes

Does the Lie algebra structure on rational homotopy groups reflect similar information to the formal group structure in characteristic p?

answered Sep 23, 2022 at 20:25

2 votes

Accepted

What is the precise relationship between real Poisson algebras and commutative $C^*$ algebras?

answered Jan 11, 2021 at 2:52

2 votes

Accepted

Proving that compact Hausdorff groups are cofiltered limits of compact Lie groups

answered Jul 27 at 20:20

2 votes

Is Grassman algebra an F-algebra?

answered Aug 5, 2013 at 1:28

2 votes

Given a generating function with "zeros", can one derive the function for ONLY the "zeros"?

answered Aug 27, 2013 at 2:29

2 votes

Axiomatization of locally compact Hausdorff spaces via compact subspaces

answered Nov 6, 2013 at 22:58

2 votes

Configuration topos?

answered Oct 28, 2013 at 23:51

2 votes

Accepted

Symplectic structure on $Sym^kG^{\mathbb{C}} $

answered Nov 3, 2013 at 21:12

2 votes

Is there a truly general voting impossibility theorem that applies to real elections?

answered Jul 18, 2014 at 19:53

2 votes

Accepted

The unit tangent bundle of 2- or 4-manifolds as a principal $S^{1}$- or $S^{3}$-bundle

answered Sep 25, 2014 at 5:01

2 votes

Cocycle condition for equivariant sheaves

answered Mar 1, 2014 at 18:38

2 votes

Finite index free subgroups of $\mathrm{SL}(3,\mathbb{Z})$

answered Jan 29, 2014 at 2:30

2 votes

A set for which it is hard to determine whether or not it is countable.

answered Mar 22, 2011 at 1:03

2 votes

"C choose k" where C is topological space

answered Dec 29, 2010 at 15:57

2 votes

What sums of equal powers of consecutive natural numbers are powers of the same order?

answered Jan 24, 2011 at 22:53

2 votes

Classifications of finite simple objects

answered Apr 3, 2011 at 18:00

2 votes

Accepted

Meaning of "Compact" in 1932 Paper by van der Waerden "Continuity Theorem for Semisimple Lie Groups".

answered May 9, 2011 at 3:17

2 votes

Knot theory without planar diagrams?

answered Aug 6, 2012 at 18:19

2 votes

Are all Finite Subsets of Affine n-space Algebraic sets, and related question

answered Dec 28, 2011 at 8:05

2 votes

Accepted

'Small' and 'large' discriminants of two-variable quadratic polynomials

answered Jul 15, 2012 at 21:19

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951 Answers

A Dold-Thom style construction of a cohomology class from a sphere bundle

Is there a nice choice-free argument to count the number of sublattices?

geometric intuition for A and A-transpose having the same eigenvalues

Product decompositions and maps from product of initial object with itself

Properties of matrix exponential without using Jordan normal forms

Can you reconstruct a simplicial set from an $\infty$-groupoid?

Morphisms between fundamental groups of Lie groups

Are chain complexes over a field always injective?

Probability theory without deductive closure

Vanishing of Kahler differentials vs. surjective Frobenius?

Does the Lie algebra structure on rational homotopy groups reflect similar information to the formal group structure in characteristic p?

What is the precise relationship between real Poisson algebras and commutative $C^*$ algebras?

Proving that compact Hausdorff groups are cofiltered limits of compact Lie groups

Is Grassman algebra an F-algebra?

Given a generating function with "zeros", can one derive the function for ONLY the "zeros"?

Axiomatization of locally compact Hausdorff spaces via compact subspaces

Configuration topos?

Symplectic structure on $Sym^kG^{\mathbb{C}} $

Is there a truly general voting impossibility theorem that applies to real elections?

The unit tangent bundle of 2- or 4-manifolds as a principal $S^{1}$- or $S^{3}$-bundle

Cocycle condition for equivariant sheaves

Finite index free subgroups of $\mathrm{SL}(3,\mathbb{Z})$

A set for which it is hard to determine whether or not it is countable.

"C choose k" where C is topological space

What sums of equal powers of consecutive natural numbers are powers of the same order?

Classifications of finite simple objects

Meaning of "Compact" in 1932 Paper by van der Waerden "Continuity Theorem for Semisimple Lie Groups".

Knot theory without planar diagrams?

Are all Finite Subsets of Affine n-space Algebraic sets, and related question

'Small' and 'large' discriminants of two-variable quadratic polynomials