Symplectic structures on 4-manifolds with a free S^1-action
Stefan Friedl (Universitaet zu Koeln)
Monday 6th February, 2012 16:30-17:30 416
Given a 4-manifold with a free circle action we will give complete description of the second cohomology classes which can be realized by symplectic forms. This is joint work with Stefano Vidussi.