GONZALO CONTRERAS, JEAN-MARC GAMBAUDO,
RENATO ITURRIAGA, AND GABRIEL P. PATERNAIN
Abstract. Let N be a 2n-dimensional manifold equipped with a symplectic
structure ! and (N ) be the Lagrangian Grassmann bundle over N . Consid*
*er
a flow OEt on N that preserves the symplectic structure and a OEt-invari*
*ant con-