Paul Schwahn (Stuttgart) will talk in the geometry seminar at 2pm on 22nd April in the Salle des Profs. Paul’s title is “The infinitesimal Einstein deformations of the complex Grassmannians and rigidity of the Einstein metrics” and his abstract is below.

*The moduli space of Einstein metrics on a given closed manifold is not well-understood, even locally. I review the deformation theory of Einstein metrics and discuss some recent progress on compact symmetric spaces. In particular, the deformability of the standard metric on complex Grassmannians is studied. This is a joint effort with Stuart J. Hall and Uwe Semmelmann.*