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21 votes
3 answers
2k views

Cohomology of fibrations over the circle: how to compute the ring structure?

This question is inspired by Cohomology of fibrations over the circle Moreover, it can be considered a subquestion of the above, but somehow it seems to me that some of the more interesting points ...
algori's user avatar
  • 23.5k
6 votes
1 answer
263 views

Simplicial approximation of a fibration

I am interested in the simplicial approximation of Serre or Hurewicz fibrations (or even fibre bundles). Let's assume $E$ and $B$ are finite simplicial complexes (or their associated geometric ...
D1811994's user avatar
  • 909
6 votes
1 answer
644 views

Torus bundles and compact solvmanifolds

I asked this question on MSE 9 days ago and it got a very helpful comment from Eric Towers providing the Palais Stewart reference, but no answers. So I'm crossposting it here. Let $$ T^n \to M \to T^m ...
Ian Gershon Teixeira's user avatar
5 votes
0 answers
242 views

characteristic classes of a covering space with symmetric group action

Let $S_n$ be the $n$-th symmetric group. Suppose we have a $n!$-sheeted covering space $$ S_n\to M\to M/S_n $$ where $M$ is a manifold. Let $\mathbb{K}$ be the real numbers $\mathbb{R}$, complex ...
QSR's user avatar
  • 2,223
3 votes
3 answers
769 views

Reducible 3d torus bundles

Here reducible means that the mapping class for the fiber is a reducible auto-homeomorph in the sense of Nielsen-Thruston. So, could anyone give me a hint to classify them? In contrast, do you agree ...
janmarqz's user avatar
  • 345
2 votes
1 answer
403 views

Compute cohomology of flat fiber bundles - does this always work?

Edit: This has been answered in this thread Are there compact flat fiber bundles with "truly" infinite structure group?. Setting Let $p: E \rightarrow B$ be a flat fiber bundle with fiber ...
ort96's user avatar
  • 404