Formula omitted]-modules on the complex projective space [formula omitted] associated to a quadric

Abstract

We give a combinatorial description of regular holonomic systems on the complex projective space CP n − 1 with characteristic variety the union of the zero section and the conormal bundle of a smooth quadric (equivalently: those that admit an infinitesimal action of PO ( n ) ). To cite this article: P. Nang, C. R. Acad. Sci. Paris, Ser. I 342 (2006).