Theorem isOpen_extChartAt_preimage

Modification history

2025-02-04 15:13
Mathlib/Geometry/Manifold/IsManifold/Basic.lean
chore(Geometry/Manifold/IsManifold): split out material on extended charts (#21219) …
Modified isOpen_extChartAt_preimageView on Github →
2024-02-01 10:54
Mathlib/Geometry/Manifold/SmoothManifoldWithCorners.lean
refactor(PartialHomeomorph): Remove explicit variable (x : M). (#10083) …
Modified isOpen_extChartAt_preimageView on Github →
2023-06-05 05:02
Mathlib/Geometry/Manifold/SmoothManifoldWithCorners.lean
feat: port Geometry.Manifold.SmoothManifoldWithCorners (#4636)
Added isOpen_extChartAt_preimageView on Github →