OAI/Geometry/SurfaceImmersion/Primitive/CrossingNeighborhood.lean

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1 declarations, 0 contain sorry, 0 declared as axioms

Extend a pointwise common half-plane to a neighborhood, with an explicit smooth transverse vector field.

  1. theorem OAI.ClosedSurfaceR4.VelocityFrame.crossing_halfplane_neighborhood line 14