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Sabrina Gemsa
  • Member for 7 years
  • Last seen more than a month ago
  • Muenster, Germany
12 votes
0 answers
306 views

For a Banach space $X$, when is $X$ homeomorphic to $X \setminus A$?

10 votes
0 answers
162 views

Baum Connes conjecture and abstract isomorphism

  • 8,680
9 votes
2 answers
751 views

Are the reduced group Von Neumann algebra/ Group $C^{\ast}$ algebra functorial in the case of LCH groups

8 votes
4 answers
2k views

Are there locally compact groups which have no compact open subgroups and no discrete infinite cyclic subgroups?

7 votes
1 answer
235 views

Applying positive maps to $K$-theory

  • 1,761
6 votes
0 answers
212 views

Group $C^*$ vs group von-Neumann algebras

4 votes
0 answers
236 views

Does the Cauchy–Schwarz inequality imply 2-positivity?

3 votes
2 answers
414 views

When does a LCA group not contain a (closed) infinite cyclic subgroup?

  • 2,709
2 votes
1 answer
243 views

Homotopy equivalence of Kasparov's $KK$-Theory

  • 29