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[Merged by Bors] - feat(topology/fiber_bundle): a topological fiber bundle is a quotient map #11194

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[Merged by Bors] - feat(topology/fiber_bundle): a topological fiber bundle is a quotient map #11194

wants to merge 1 commit into from

Commits on Jan 3, 2022

  1. feat(topology/fiber_bundle): a topological fiber bundle is a quotient… 

    … map

* The projection map of a topological fiber bundle (pre)trivialization
  is surjective onto its base set.

* The projection map of a topological fiber bundle with a nonempty
  fiber is surjective. Since it is also a continuous open map, it is a
  quotient map.

* Golf a few proofs.
    @urkud
    urkud committed Jan 3, 2022
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