OAI/Geometry/SurfaceImmersion/Whitney/AdvancingCornerArc.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

An advancing corner has an actual regular embedded surface rounding in any prescribed open neighborhood, with the original branch germs at both ends.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.RegularPathCornerChart.advancing_corner_arc line 18