[CvGmt News] [Notiziario] [Settimanale] notiziario settimanale

[Giulia Curciarello]

mercoledi' - 14-04-2004 (11:00 - Aula Riunioni* del Centro di Ricerca
Matematica Ennio De Giorgi palazzo Puteano) :
Etienne Ghys
Fatou and Julia sets for holomorphic foliations
argomento: Geometria
abstract:
SEMINARIO DI SISTEMI DINAMICI (olomorfi e dintorni)
D. Sullivan noticed a strong analogy between the dynamics of rational maps,
kleinian groups, and (transversaly) holomorphic foliations. In this talk, I
would like to discuss a joint work with Gomez-Mont and Saludes in which we
try to generalize (as much as possible) the Julia-Fatou theory and the "non
wandering theorem" in the context of foliations.


giovedi' - 15-04-2004 (16:30 - Sala Seminari) :
Vladimir Gerdt
Algorithmic Generation of Finite Difference Schemes for Differential
Equations

abstract:
We present an algorithmic technique for construction of fully conservative
finite difference schemes for partial differential equations. This technique
based on discretization of the initial equation in its conservation law form
together with some extra integral relations. It yields an algebraic system
for
discrete values of the sought functions and its derivatives. The difference
scheme is obtained by elimination of the derivatives what can be done by
construction of an appropriate pure algebraic Groebner or involutive basis.
We demonstrate the technique by the classical Laplace equation, heat
equation and wave equation. As a nontrivial example we consider also
nonlinear Falkowich-Karman equation describing transonic flow in gas
dynamics.

martedi' - 20-04-2004 (15:00 - Sala Seminari) :
Andrei Pajitnov

Circle-valued Morse theory, Novikov homology, and twisted Alexander
polynomial.
argomento: Geometria


mercoledi' - 21-04-2004 (17:00 - Sala Riunioni) :
Daniel Naie
On varieties containing quasi lines
argomento: Geometria
abstract:
Let X be a smooth complexe projective variety. A curve C of X isomorphic to
P1 is called a quasi-line if its normal bundle decomposes as as a sum of
\O_{P1}(1). A variety containing a quasi-line is a particular case of a
rationally connected variety.I show that a rationally connected variety
contains a quasi-line after a sequence of blowing ups with smooth centers. I
study the geometry of these varieties: stability under small deformations,
existence of a numerical invariant characterising the rationality...

 giovedi' - 22-04-2004 (15:00 - Sala Seminari) :
Stefano Francaviglia
Groups of isometries, harmonic measures and equivariant maps.
argomento: Geometria

giovedi' - 22-04-2004 (15:00 - Sala Riunioni) :
Maria Grazia NASO
COMPORTAMENTO ASINTOTICO DELLE SOLUZIONI PER EQUAZIONI CON MEMORIA
DISSIPATIVA









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

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