OAI/Geometry/SurfaceImmersion/Atlas/PhaseNormalNeighborhood.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

The local exact normal defines a genuine smooth unit normal on an open surface neighborhood of the closed primitive disk.

  1. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.SmoothingAtlas.phaseNormalLift_coordinates line 19
  2. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.SmoothingAtlas.phase_normal_neighborhood line 25