OAI/Geometry/SurfaceImmersion/Whitney/PreparedCrosscapNeighborhoods.lean

GitHub source file

1 declarations, 0 contain sorry, 0 declared as axioms

Disjoint compact frozen neighborhoods inside the actual quadratic crosscap charts.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.prepared_crosscap_neighborhoods line 15