OAI/Geometry/SurfaceImmersion/Whitney/DoubleCurveParameter.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

A regular smooth curve lying in an actual double-locus chart has a smooth local scalar parameter with nonzero derivative.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.SmoothDoubleChart.curve_parameter line 16