OAI/Geometry/SurfaceImmersion/Whitney/ClosedDoubleArcLift.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

An ordered lift of a double arc extends continuously to its two crosscap endpoints, since each diagonal fiber is a singleton.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.closed_double_arc_lift line 14
  2. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.embedded_closed_double_arc_lift line 62