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Theorem ext_chart_preimage_open_of_open'

Modification history

2022-12-02 20:41
src/geometry/manifold/smooth_manifold_with_corners.lean
feat(geometry/manifold/smooth_manifold_with_corners): define local_homeomorph.extend (#17669) …
Deleted ext_chart_preimage_open_of_open'View on Github →
2021-03-31 11:08
src/geometry/manifold/smooth_manifold_with_corners.lean
feat(geometry/manifold/bump_function): define smooth bump functions, baby version of the Whitney embedding thm (#6839) …
Added ext_chart_preimage_open_of_open'View on Github →