User Qiaochu Yuan

13 votes

2 answers

1k views

Does the Poincare series of a Coxeter group always describe a "flag variety"?

asked Jun 16, 2010 at 18:42

13 votes

2 answers

912 views

Is there an analogue of the Lefschetz fixed point theorem for discrete dynamical systems?

asked Jan 5, 2010 at 1:38

13 votes

1 answer

860 views

What does the incidence algebra of the lattices in C tell us about modular forms?

asked Feb 2, 2010 at 7:40

12 votes

2 answers

1k views

Highbrow interpretations of Stirling number reciprocity

asked Dec 25, 2009 at 1:45

12 votes

4 answers

2k views

Which compact groups have finitely many irreducible representations of each dimension?

asked Apr 30, 2010 at 16:50

12 votes

1 answer

2k views

Wick rotation and the Riemann zeta function

asked Nov 14, 2010 at 3:00

12 votes

2 answers

920 views

What reasonable choices of morphisms are there for the category of Poisson algebras?

asked Aug 15, 2011 at 15:06

12 votes

1 answer

849 views

Is there any relationship between the Euler class and the Vandermonde determinant?

asked Oct 15, 2014 at 18:21

11 votes

1 answer

831 views

The Sato-Tate conjecture for hypersurfaces?

asked Dec 15, 2013 at 0:02

11 votes

1 answer

699 views

What interesting homotopy invariants can I write down using the universal property of homotopy types?

asked Oct 2, 2013 at 4:09

11 votes

1 answer

360 views

Does this notion of pseudoprime relative to a matrix appear in the literature?

asked Aug 8, 2012 at 15:18

11 votes

3 answers

2k views

How do you recover the structure of the upper half plane from its description as a coset space?

asked Mar 29, 2010 at 16:59

11 votes

1 answer

672 views

Is it always possible to compute the Betti numbers of a nice space with a well-chosen Lefschetz zeta function?

asked Jan 28, 2010 at 22:10

11 votes

4 answers

756 views

Is there a categorification of the integers in terms of "graded sets"?

asked Oct 30, 2009 at 22:09

10 votes

2 answers

1k views

What numbers can be approximated "pretty well" by rationals?

asked Oct 24, 2010 at 14:05

10 votes

2 answers

3k views

The definition of a group object is wrong?

asked May 30, 2011 at 17:26

9 votes

2 answers

626 views

Does any identity holding in all finite-dimensional Lie algebras hold in all Lie algebras?

asked Aug 12, 2012 at 3:59

9 votes

3 answers

564 views

For G a Lie group, can I make sense of G/G as a derived manifold in a nice way?

asked Oct 1, 2013 at 16:47

9 votes

0 answers

538 views

Twisted equivariant modular forms?

asked Jan 30, 2015 at 1:39

8 votes

1 answer

591 views

Defining holomorphic functions in terms of Banach algebras, and similarly for C*-algebras

asked Jun 5, 2013 at 6:22

8 votes

3 answers

515 views

Are two elements of a group determined up to simultaneous conjugacy by the conjugacy classes of all of their products?

asked Oct 4, 2012 at 5:44

8 votes

1 answer

510 views

Reference request: the "Kauffman bracket skein category"?

asked Oct 9, 2012 at 7:53

8 votes

0 answers

340 views

Do p-compact groups have a sufficiently good notion of "flag variety" and "intersection cohomology"?

asked Jul 1, 2010 at 19:24

8 votes

3 answers

409 views

How does one identify properties of objects with good "inheritance"?

asked Nov 10, 2009 at 8:10

8 votes

1 answer

998 views

Generalized Teichmuller representatives

asked Oct 13, 2009 at 7:07

7 votes

7 answers

636 views

Given a sequence defined on the positive integers, how should it be extended to be defined at zero?

asked Oct 19, 2009 at 6:55

7 votes

1 answer

459 views

Reference for equivalent definitions of the genus

asked Jan 14, 2010 at 18:06

7 votes

1 answer

434 views

Monotonic maximal chains in a Coxeter group

asked Jul 13, 2010 at 22:48

7 votes

1 answer

675 views

How does this geometric description of the structure of PSL(2, Z) actually work?

asked Mar 18, 2010 at 20:35

7 votes

2 answers

578 views

Which commutative algebras admit a nonzero Poisson bracket?

asked Aug 3, 2011 at 19:34

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179 Questions

Does the Poincare series of a Coxeter group always describe a "flag variety"?

Is there an analogue of the Lefschetz fixed point theorem for discrete dynamical systems?

What does the incidence algebra of the lattices in C tell us about modular forms?

Highbrow interpretations of Stirling number reciprocity

Which compact groups have finitely many irreducible representations of each dimension?

Wick rotation and the Riemann zeta function

What reasonable choices of morphisms are there for the category of Poisson algebras?

Is there any relationship between the Euler class and the Vandermonde determinant?

The Sato-Tate conjecture for hypersurfaces?

What interesting homotopy invariants can I write down using the universal property of homotopy types?

Does this notion of pseudoprime relative to a matrix appear in the literature?

How do you recover the structure of the upper half plane from its description as a coset space?

Is it always possible to compute the Betti numbers of a nice space with a well-chosen Lefschetz zeta function?

Is there a categorification of the integers in terms of "graded sets"?

What numbers can be approximated "pretty well" by rationals?

The definition of a group object is wrong?

Does any identity holding in all finite-dimensional Lie algebras hold in all Lie algebras?

For G a Lie group, can I make sense of G/G as a derived manifold in a nice way?

Twisted equivariant modular forms?

Defining holomorphic functions in terms of Banach algebras, and similarly for C*-algebras

Are two elements of a group determined up to simultaneous conjugacy by the conjugacy classes of all of their products?

Reference request: the "Kauffman bracket skein category"?

Do p-compact groups have a sufficiently good notion of "flag variety" and "intersection cohomology"?

How does one identify properties of objects with good "inheritance"?

Generalized Teichmuller representatives

Given a sequence defined on the positive integers, how should it be extended to be defined at zero?

Reference for equivalent definitions of the genus

Monotonic maximal chains in a Coxeter group

How does this geometric description of the structure of PSL(2, Z) actually work?

Which commutative algebras admit a nonzero Poisson bracket?