OAI/Geometry/SurfaceImmersion/Whitney/ArcJoinOrientation.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

The orientation required for joining is forced by separation of the old and new compact arc interiors. It is not an additional geometric choice.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.arc_join_deriv_pos line 14