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|Geometric invariants of cuspidal edges|
We give a normal form of the cuspidal edge which uses only diffeomorphisms on the source and isometries on the target. Using this normal form, we study differential geometric invariants of cuspidal edges which determine them up to order three. We also clarify relations between these invariants.
Keywords:cuspidal edge, curvature, wave fronts
Categories:57R45, 53A05, 53A55