par Cahen, Michel ;Flato, M.;Gutt, Simone ;Sternheimer, Daniel
Référence Journal of geometry and physics, 2, 1, page (35-48)
Publication Publié, 1985
Article révisé par les pairs
Résumé : The procedure of * quantization introduces the notions of mathematical equivalence and of * spectrum. We prove that mathematical equivalence, as a change of ordering for quantum operators to which it is related, does not preserve * spectrum unless it reduces to an automorphism of the * product. Suggestions about the {left double angle bracket}correct{right double angle bracket} choice of * products are made. © 1985.