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Gian Maria Dall'Ara
  • Member for 12 years, 9 months
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  • Pisa or Cincelli (Italy)
45 votes
14 answers
11k views

Introductory text on geometric group theory?

40 votes
7 answers
12k views

Classification of (compact) Lie groups

28 votes
7 answers
7k views

Are there two non-homotopy equivalent spaces with equal homotopy groups?

14 votes
1 answer
478 views

Is a polynomial group law on $\mathbb{R}^n$ automatically nilpotent?

13 votes
1 answer
965 views

Gelfand-Naimark from the category-theoretic point of view

13 votes
4 answers
2k views

Partitions-sum of divisors identity

11 votes
2 answers
2k views

Hypoellipticity of square root of laplacian

8 votes
2 answers
746 views

Choice function for Borel sets?

7 votes
5 answers
3k views

Low dimensional nilpotent Lie algebras

7 votes
2 answers
408 views

Density of a subset of the reals

6 votes
6 answers
2k views

Spectra of $C^*$ algebras

4 votes
2 answers
330 views

Converse to Chow's theorem in sub-riemannian geometry

4 votes
2 answers
170 views

Lower bounds on the Ricci curvature of Kähler submanifolds of $\mathbb{C}^n$

3 votes
1 answer
258 views

L^p Idempotent multipliers in 2 dimensions

3 votes
1 answer
2k views

Closed subgroups of GL(n)

2 votes
1 answer
135 views

Cutting a subset in many pieces with controlled perimeter

1 vote
0 answers
84 views

Invertibility of Hankel operators?

1 vote
0 answers
116 views

How to Prove that nilpotent Lie groups satisfy the Leptin condition?

0 votes
1 answer
206 views

Name for ideal generated by Lie subalgebra