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math.DG1998
Lorentzian worldlines and Schwarzian derivative
C. Duval, V. Ovsienko
We relate in this note the classical Schwarzian derivative to the curvature of time-like curves in Lorentz surfaces of constant curvature.
math.DG1998
Conformally equivariant quantization
C. Duval, V. Ovsienko
Let be a pseudo-Riemannian manifold and the space of densities of degree on . We study the space of second-order differential operators from…