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visits member for 4 years
seen Jun 19 '13 at 21:33

Jun
13
answered Seifert Fibrations and their associated Spectral Sequence
Jun
13
asked Krull dimension in equivariant cohomology
Oct
15
asked H-spaces without rational homology
Oct
16
awarded  Yearling
Jun
27
accepted Cohomology of finite quotients of Lie groups
Jun
22
comment Cohomology of finite quotients of Lie groups
It sounds very interesting. Unfortunately, I do not know what gerbes are have to believe you without understanding the reason. Your answer shows that the problem is probably very difficult in general.
Jun
22
comment Cohomology of finite quotients of Lie groups
@Konrad: This sounds intersting and would help me to understand the situation at least a little bit. Is it difficult to see? Or is there a reference for this claim?
Jun
22
comment Cohomology of finite quotients of Lie groups
In fact, I would not know how to use that $\Gamma$ is in the center. For istance, I do not know if the map on $H^3$ is a surjection, if $G=SU(3)$ and $\Gamma$ the center of $G$.
Jun
22
comment Cohomology of finite quotients of Lie groups
No, I would not like to assume that $\Gamma$ is in the center. If my Lie group is $Spin$, as in the question, and the order of the group not divisible by $2$, it cannot be in the center anyway.
Jun
22
asked Cohomology of finite quotients of Lie groups
Dec
15
awarded  Scholar
Dec
15
awarded  Supporter
Dec
15
accepted Regular simplex in projective space
Dec
15
comment Regular simplex in projective space
Many thanks for the surprising answer.
Dec
15
comment Regular simplex in projective space
No, I really meant the projective space and am very surprised by the negative answer to my question.
Dec
14
asked Regular simplex in projective space
Dec
9
awarded  Student
Dec
9
comment Covering a subset by submanifolds
Yes, one considers $K$ with the subspace topology. The subset $K$ satisfies the assumption and conclusion with $l=2$ but not with $l=1$ (at any point of $[0,1] \times 0$
Dec
9
asked Covering a subset by submanifolds
Oct
15
awarded  Teacher