OAI/Geometry/SurfaceImmersion/Whitney/SmoothArcTimeDerivative.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

The extended longitudinal parameter has derivative one on the arc, including its endpoints, and is a submersion there.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.smooth_arc_time_derivative line 13