OAI/Geometry/SurfaceImmersion/Primitive/ActualCrossingInvariant.lean

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3 declarations, 0 contain sorry, 0 declared as axioms

Identify the actual ordered boundary invariant with the normal-coordinate formula. Euclidean normalization is preserved by the coordinate conversion.

  1. lemma OAI.ClosedSurfaceR4.GeometryPreservation.spaceCoordinates_norm line 13
  2. lemma OAI.ClosedSurfaceR4.GeometryPreservation.spaceCoordinates_symm_normalize line 17
  3. lemma OAI.ClosedSurfaceR4.GeometryPreservation.SecondFormFrame.orderedCrossing_eq line 24