Geometria em Lisboa 15 April 2003, 17h00 Abstract: In joint work with Silvia Anjos we continue the analysis by Abreu, MacDuff and Anjos of the topology of the group of symplectomorphisms of S^2 x S^2 when the ratio of the areas of the spheres lie in the interval ]1,2]. We express the group of symplectomorphisms up to homotopy as the pushout (or amalgam) of certain compact Lie subgroups. We use this to give a homotopy decomposition of its classifying space and compute the corresponding ring of characteristic classes for symplectic fibrations. Time: Tea 4.30 pm, Talk 5.00 pm | back |