[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

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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

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Giulia Curciarello
Segreteria Didattica
tel: 050-2213219
e-mail curciare at dm.unipi.it

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