OAI/Geometry/SurfaceImmersion/Primitive/IndependentPrimitiveNormalMargin.lean

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The primitive's transverse margin and exterior convergence give a uniform second-form lower bound in every chart of the fixed atlas.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.MetricGoodPhaseData.independent_primitive_atlas_normal_margin line 20