OAI/Geometry/SurfaceImmersion/Whitney/PairArcJoin.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Two compact regular pair arcs meeting in the actual transverse double locus can be joined smoothly. Their disjoint interiors force the orientation.

  1. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.compact_pair_arc_regular line 17
  2. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.join_pair_arcs line 29