OAI/Geometry/SurfaceImmersion/Whitney/CrosscapArcCoordinates.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

Actual smooth source coordinates at a crosscap which agree exactly with the chosen source-arc parameter, retaining the full map formula.

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