SEMINARI
DI MATEMATICA
ore 16.00
Scuola Normale
Superiore
Pisa
(Aula Bianchi)
Clemens
Fuchs
Politecnico ETH
di Zurigo
Terrà
un seminario dal titolo:
“On
effective versions of a theorem due to Shafarevich”
Abstract:
Let
K be a number field and let S be a finite set of places of K. A classical
theorem of Shafarevich says that there are only finitely many K-isomorphism
classes of elliptic curves over K with good reduction outside S. An effective
version of this statement for K=Q was already proved by Coates. In the talk we
discuss an extension to arbitrary number fields. We give explicit bounds and
compare them with the one obtained by Coates. One of the important features of
the result is that we view an elliptic curve as a purely geometric object which
is natural and gives flexibility for further generalisations. This is joint work
with R. von Känel and G. Wüstholz.
Tutti gli
interessati sono invitati a partecipare.
Classe
di Scienze