Segnalo due seminari nelle prossime settimane:
Mercoledi' 15 maggio
ore 16:00 Aula Magna (Dip. Matematica)
On simple and quasi-simple rational polynomials
Pierrette Cassou-Nogues (Universitè de Bordeaux)
Abstract:
This is a joint work in progress with Daniel Daigle.
We will explain how to use combinatorial methods to classify
simple and quasi-simple rational polynomials.
Venerdi' 24 maggio
14:30, Sala Riunioni (Dip. Matematica)
Derived categories of Burniat surfaces and exceptional
collections
Valery Alexeev (UGA)
Abstract: The derived category of a del Pezzo surface can be
conveniently described by an exceptional sequence. We show that
for Burniat surfaces, regular surfaces of general type which can
be thought of as "fake del Pezzo surfaces of degree 6", the
situation is roughly speaking the opposite. There exists an
exceptional collection of maximal possible length which is
completely rigid, and its semiorthogonal complement is a
mysterious "quasi-phantom category" which contains all the
information about the modulus of the surface. The main tool for
the construction is understanding the Picard groups of Burniat
surfaces.
Ciao,
Rita
--
Rita Pardini
Dipartimento di Matematica - Pisa
http://www.dm.unipi.it/~pardini