OAI/Geometry/SurfaceImmersion/Whitney/NormalCollarGluing.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Glue the local adjusted normal to the exterior projected normal. The cutoff support conditions remove every use of an unavailable chart.

  1. lemma OAI.ClosedSurfaceR4.VelocityFrame.first_contMDiffAt line 15
  2. theorem OAI.ClosedSurfaceR4.VelocityFrame.normal_collar_gluing line 31