OAI/Geometry/SurfaceImmersion/Atlas/PhaseChartNormalTransport.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

A normal-curvature margin in a phase chart gives a fixed margin in the original coordinates, uniformly for every smooth immersion.

  1. lemma OAI.ClosedSurfaceR4.PhaseGeometry.phase_chart_normal_transport line 14
  2. theorem OAI.ClosedSurfaceR4.PhaseGeometry.compact_phase_chart_normal_margin line 40