OAI/Geometry/SurfaceImmersion/Whitney/CrosscapStripRegularNeighborhood.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

A thin actual source rectangle has no singularities except the two specified endpoint crosscaps.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.CrosscapCoordinateStrip.regular_neighborhood line 17