OAI/Geometry/SurfaceImmersion/Whitney/StandardCrosscapDerivative.lean

GitHub source file

4 declarations, 0 contain sorry, 0 declared as axioms

The standard umbrella has one singular point and a transverse double ray.

  1. def OAI.ClosedSurfaceR4.FiniteOrderSmoothing.standardCrosscapDerivative line 16
  2. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.standardCrosscap_hasFDerivAt line 21
  3. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.standardCrosscap_immersion_iff line 48
  4. lemma OAI.ClosedSurfaceR4.FiniteOrderSmoothing.standardCrosscap_double_iff line 82