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Ben Wieland's user avatar
Ben Wieland's user avatar
Ben Wieland
  • Member for 14 years, 9 months
  • Last seen more than a month ago
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question
44
Does $\mathbb C\mathbb P^\infty$ have a group structure?
Mar 31, 2016
answer
38
Natural examples of sequences of adjoint functors
Nov 22, 2010
answer
26
Does there exist a closed manifold that can be given both a Euclidean and a Hyperbolic structure?
May 11, 2014
answer
25
Is there a universal countable group? (a countable group containing every countable group as a subgroup)
Jun 21, 2010
answer
25
A "meta-mathematical principle" of MacPherson
Jun 11, 2011
answer
24
Difference between represented and singular cohomology?
Jun 24, 2010
question
23
Why are Tamagawa numbers equal to Pic/Sha?
Oct 29, 2010
question
23
Does smooth and proper over $\mathbb Z$ imply rational?
May 16, 2012
answer
21
In what sense is the classification of all finite groups "impossible"?
Sep 9, 2014
question
18
Is homology finitely generated as an algebra?
Oct 3, 2014