OAI/Geometry/SurfaceImmersion/Primitive/SurfaceCrossingExterior.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

Both intrinsic crossing invariants and positive normal pairings survive on the exterior part of any compact set of mutual curve intersections.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.PhaseBoundaryCurve.exterior_crossing_preservation line 17