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Roberto Frigerio's user avatar
Roberto Frigerio's user avatar
Roberto Frigerio's user avatar
Roberto Frigerio
  • Member for 14 years, 3 months
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question
41
Homotopy groups of $S^2$
May 6, 2011
question
22
Geodesics on the sphere
Jan 14, 2019
answer
21
How many elements does it take to normally generate a group?
Feb 10, 2011
answer
19
Non-commutator in simple group?
May 1, 2012
question
18
The number of cusps of higher-dimensional hyperbolic manifolds
Sep 7, 2010
question
15
smooth sections of smooth fiber bundles
May 25, 2010
answer
14
Which knots are singularities of a hyperbolic cone-manifold structures on $S^3$?
Oct 10, 2018
question
13
Fox differential calculus and the Alexander invariant of a link
Nov 13, 2011
answer
12
Connections between ultrafilters in topology and logic
May 27, 2010
question
11
Quasi-isometric rigidity of Nil
Jan 18, 2016