Singularities of a geodesic flow on surfaces with a cuspidal edge
Alexey Olegovich Remizov · Proceedings of the Steklov Institute of Mathematics · 2010
This paper is a study of singularities of geodesic flows on surfaces with nonisolated singular points that form a smooth curve (like a cuspidal edge). The main results of the paper are normal forms of the corresponding direction field on the tangent bundle of the plane of local coordinates and the projection of its trajectories to the surface.