KTH/SU Mathematics Colloquium

06-11-08

Edoardo Sernesi, University of Rome 3

Focal loci of a family

I will introduce the notion of focal point of a family of projective varieties, used in classical projective differential geometry and I will give some applications of it. In particular I will show how it can be applied to the study of the theta divisor of the jacobian variety of a Riemann surface.