OAI/Geometry/SurfaceImmersion/Whitney/CrosscapCoordinateStrip.lean

GitHub source file

2 declarations, 0 contain sorry, 0 declared as axioms

The actual map on a rectangular source strip through two crosscaps, with a nonzero transverse derivative along the entire central arc.

  1. structure OAI.ClosedSurfaceR4.FiniteOrderSmoothing.CrosscapCoordinateStrip line 16
  2. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.exists_crosscap_coordinate_strip line 39