Mercredi 27 mai, salle 112, à 16h00,
University of Michigan.
Titre : Krull dimension for limit groups.
Résumé : There is one-to-one correspondence between limit groups and
irreducible varieties defined over the free group, objects which are
fundamental in the study of the first order theory of the free group.
I will discuss the (very topological) proof of their finite
dimensionality, and raise some natural questions about subgroups of
hyperbolic groups which seem to be necessary in an attempted
generalization to varieties defined over a hyperbolic group.