Veronese webs for bihamiltonian structures of higher corank

Abstract

It is shown how the well-known class of bihamiltonian structures in general position can be extended to a wider class. A generalization of the corresponding notion of a Veronese web for this wider class is presented (in the general position case Veronese webs form complete systems of local invariants for bihamiltonian structures). Some examples are considered.

11p. To appear in: Banach Center Publications, Proc. of "Poisson Geometry" conference dedicated to the memory of Stanislaw Zakrzewski, Warsaw 1998, J.Grabowski, P.Urbanski eds