OAI/Geometry/SurfaceImmersion/Whitney/SmoothDoubleArcProjections.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

Both sheets and their common image are regular along a smooth double arc whenever the two surface points are regular.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.SmoothDoubleArc.regular_projections line 16