# University of Toronto's Symplectic Geometry Seminar

Oct. 7 2002, 2:10 - 3

SS5017A

## Martin Pinsonnault

###
University of Toronto

##
"Cohomology of some symplectomorphism groups"

** Abstract: **
In this talk, we will explain how the rational cohomology ring
of Sympl(X) can be calculated when X is a rational symplectic 4-manifold.
Complete results will be given for $CP^2$, $S^2\times S^2$ and their
blow-ups at a ball of capacity $c$.