OAI/Geometry/SurfaceImmersion/Whitney/CrosscapCoordinateRegularity.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Nondegenerate direction zeros are retained in the actual full-arc coordinates, at both singular endpoints.

  1. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.crosscap_coordinate_direction_regularity line 16
  2. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.CrosscapCoordinateStrip.endpoint_direction_regular line 35