OAI/Geometry/SurfaceImmersion/Whitney/CrosscapCompactArc.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

An embedded compact half-arc in the actual unordered double curve, with its endpoint at the prepared crosscap.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.crosscap_compact_half_arc line 16