New answers tagged short-exact-sequences
2
votes
$String/CP^{\infty}=Spin$ or a correction to this quotient group relation
The topological groups $String$ and $BS^1$ are - a priori - only defined up to homotopy equivalence. In that setting, it makes sense to talk about fibre sequences, but the question for a group ...
- 4,094
3
votes
$String/CP^{\infty}=Spin$ or a correction to this quotient group relation
These are sequences not of groups, but of ∞-groups,
which can be modeled as simplicial groups or topological groups, equipped with a class of weak equivalences induced from simplicial sets or ...
- 35.5k
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