[CvGmt News] [Notiziario] [Settimanale] notiziario settimanale
Giulia Curciarello
curciare at dm.unipi.it
Mon Nov 29 11:51:58 CET 2004
mercoledi' 01-12-2004 (15:30) - Sala dei seminari
Margarida Mendes Lopes (Instituto Superior Tecnico - Lisbona) :
Even sets of nodes on rational surfaces
Argomento: Geometria
Let X be a smooth projective algebraic surface over an algebraically closed
field K of characteristic different from 2. A nodal curve on X is a curve
isomorphic to P^1 with self-intersection -2 (i.e. a -2-curve). A set of r
disjoint nodal (i.e -2-curves) N_1,... N-k is called an even set if there
exists a divisor L on X such that 2Lis linearly equivalent to N_1+...N_k.
An algebraic complex surface Z is a nodal surface if its only singularities
are nodes (i.e. ordinary double points). In a (minimal) resolution of
singularities of X-->Z, one has above each node of Z a nodal curve, and
a set of nodes on Z is called an even set if the corresponding set of nodal
curves on X is an even set.
In this seminar we will discuss how even sets of nodal curves arise on
rational surfaces and we will discuss some consequences.
giovedi' 02-12-2004 (11:00) - Aula Fermi. S.N.S.
Vittoria Pierfelice :
Stime pesate di Strichartz per l'equazione di Schroedinger su spazi
iperbolici
venerdi' 03-12-2004 (15:00) - Sala Riunioni
Roberto Frigerio : seminario sul flusso di Ricci
La congettura di Thurston
*******************************************
lunedi' 06-12-2004 (16:30) - Aula Bianchi S.N.S.
David Martinez :
CR manifolds and generic linear systems
lunedi' 13-12-2004 (15:00) - Aula Fermi S.N.S.
Nicola Arcozzi :
Misure di Carleson e successioni interpolanti
************************************************
Giulia Curciarello
Segreteria Didattica
tel: 050-2213219
e-mail curciare at dm.unipi.it
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