User Roberto Frigerio - MathOverflow

Roberto Frigerio

Member for 13 years, 6 months
Last seen more than a month ago

dm.unipi.it/~frigerio
Pisa, Italy

15 Questions

Score Activity Newest Views

40 votes

2 answers

5k views

Homotopy groups of $S^2$

asked May 6, 2011 at 15:34

22 votes

15 answers

6k views

Geodesics on the sphere

asked Jan 14, 2019 at 12:55

18 votes

3 answers

1k views

The number of cusps of higher-dimensional hyperbolic manifolds

asked Sep 7, 2010 at 15:06

15 votes

3 answers

2k views

smooth sections of smooth fiber bundles

asked May 25, 2010 at 12:15

13 votes

1 answer

2k views

Fox differential calculus and the Alexander invariant of a link

asked Nov 13, 2011 at 20:22

11 votes

2 answers

704 views

Quasi-isometric rigidity of Nil

asked Jan 18, 2016 at 11:37

10 votes

1 answer

1k views

Two questions about sphere bundles

asked Feb 19, 2014 at 17:16

10 votes

1 answer

1k views

Alexandrov angles in Riemannian manifolds

asked Apr 26, 2013 at 22:09

7 votes

4 answers

1k views

Examples of "exotic" induction

asked Jan 21, 2013 at 17:24

7 votes

1 answer

379 views

Smooth functions on subsets of $\mathbb{R}^n$

asked Sep 27, 2018 at 13:59

5 votes

0 answers

279 views

Two natural maps asssociated with the nerve of a cover

asked Apr 14, 2016 at 14:46

5 votes

2 answers

443 views

A name for a weak topology

asked Apr 23, 2012 at 14:49

3 votes

1 answer

640 views

Homology boundary links

asked Dec 22, 2010 at 9:43

2 votes

3 answers

985 views

Reference for the geometry of horospheres

asked May 31, 2010 at 14:26

0 votes

0 answers

172 views

Existence of special pants decompositions for non-elementary representations into PSL(2,R)

asked Jul 17, 2013 at 15:29