Emmanuel Ullmo

Positivite et discretion des points algebriques des courbes

We prove the discreteness of algebraic points (with respect to the Neron-Tate height) on a curve of genus greater than one embedded in his jacobian. This result was conjectured by Bogomolov. We also prove the positivity of the self intersection of the admissible dualizing sheaf.

Algebraic flows on Shimura varieties

In this paper we prove two results on algebraic flows on Shimura varieties. One is the so-called ‘logarithmic’ Ax-Lindemann theorem. The other concerns the closure of the image of a totally geodesic sub-variety of a symmetric space by the uniformisation map.