2 papers
math.QA2001
Projectively equivariant quantization and symbol calculus: noncommutative hypergeometric functions
C. Duval, V. Ovsienko
We extend projectively equivariant quantization and symbol calculus to symbols of pseudo-differential operators. An explicit expression in terms of hypergeometric functions with no…
math.DG1998
The Virasoro group and the fourth geometry of Poincaré
C. Duval, L. Guieu
We investigate, in some details, symplectic equivalence between several conformal classes of Lorentz metrics on the hyperboloid of one sheet and affi…