Title:  Narrow and wide Lagrangian submanifolds .

Abstract:  I will describe some new structural results for monotone
Lagrangian submanifolds - width estimates, homological rigidity as
well as intersection statements. The proofs are based on algebraic
techniques which allow one to use the the uniruling of the ambient
symplectic manifold to deduce uniruling results of the Lagrangian
submanifolds.
Joint work with Paul Biran.