User Olivier Bégassat

145 votes

14 answers

50k views

Why study Lie algebras?

asked Mar 17, 2011 at 0:24

45 votes

4 answers

5k views

Polynomial roots and convexity

asked Mar 18, 2011 at 6:46

36 votes

4 answers

5k views

Compact open topology on $\mathrm{Homeo}(X)$

asked Mar 16, 2011 at 22:09

15 votes

3 answers

4k views

What holomorphic functions are limits of polynomials?

asked Mar 25, 2011 at 7:06

10 votes

2 answers

824 views

Open problems in hyperplane/subspace arrangements?

asked Jun 14, 2015 at 0:31

9 votes

1 answer

344 views

Explicit calculations of small homotopy limits of CDGAs

asked May 18, 2016 at 23:52

9 votes

6 answers

5k views

Examples of naturally occurring Quadratic forms or quadrics.

asked Mar 18, 2011 at 20:10

8 votes

2 answers

1k views

Trivial fiber bundle

asked Mar 16, 2011 at 20:36

5 votes

0 answers

204 views

Shrinking Group Actions

asked Jun 11, 2011 at 5:27

4 votes

2 answers

418 views

Bivariate polynomial divisibility test of Spielman

asked Dec 18, 2019 at 19:16

3 votes

0 answers

110 views

Distributive lattices -> left regular bands -> Atomistic lower semimodular lattices

asked Mar 2, 2017 at 19:47

3 votes

1 answer

492 views

Is $\partial \Gamma\hookrightarrow \Gamma$ a Serre cofibration?

asked May 29, 2017 at 10:20

3 votes

2 answers

1k views

How many semidirect products are there?

asked Mar 18, 2011 at 11:27

2 votes

0 answers

742 views

Recognizing "complete" $\sigma$-algebras

asked Jan 3, 2018 at 12:04

1 vote

1 answer

153 views

Interpolating Maximum function with symmetric polynomials

asked Apr 30, 2019 at 0:53

1 vote

1 answer

390 views

nullity of the second fundamental group of a Lie group

asked Mar 17, 2011 at 0:39

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16 Questions

Why study Lie algebras?

Polynomial roots and convexity

Compact open topology on $\mathrm{Homeo}(X)$

What holomorphic functions are limits of polynomials?

Open problems in hyperplane/subspace arrangements?

Explicit calculations of small homotopy limits of CDGAs

Examples of naturally occurring Quadratic forms or quadrics.

Trivial fiber bundle

Shrinking Group Actions

Bivariate polynomial divisibility test of Spielman

Distributive lattices -> left regular bands -> Atomistic lower semimodular lattices

Is $\partial \Gamma\hookrightarrow \Gamma$ a Serre cofibration?

How many semidirect products are there?

Recognizing "complete" $\sigma$-algebras

Interpolating Maximum function with symmetric polynomials

nullity of the second fundamental group of a Lie group