[CvGmt News] [Notiziario] [Settimanale] Fw: avviso seminario di matematica Prof. Gabriele Vezzosi (08.06.2011)

[Liviana Paoletti]

Inoltro avviso di Seminario a me pervenuto.
Cordiali saluti
Liviana Paoletti
----- Original Message ----- 
From: Valeria Giuliani 
Subject: avviso seminario di matematica Prof. Gabriele Vezzosi (08.06.2011)


SEMINARIO DI MATEMATICA


mercoledì 08 giugno 2011
ore 15.00

 

Scuola Normale Superiore

Pisa

(Sala degli Stemmi)



Gabriele Vezzosi

Université de Lille - France

 

Terrà  un seminario dal titolo:

 

“Reduced obstruction theories via derived algebraic geometry”

 

Abstract

 

Let S be an algebraic K3-surface, g ≥ 0, and b ≠ 0 in H_2(S, Z) a curve class. After recalling the necessary background on derived algebraic geometry I will construct a derived stack RM whose truncation is the usual stack M of stable maps from curves of genus g to S hitting the class b, and such that the inclusion of M into RM induces on M a perfect obstruction theory whose tangent and obstruction spaces coincide with the corresponding reduced spaces of Okounkov–Maulik–Pandharipande–Thomas. This approach uses derived algebraic geometry and yields not only a full rigorous proof of the existence of a global reduced obstruction theory, not relying on any result on semiregularity maps, but also a new global geometric interpretation. This is joint work with T. Schürg (Mainz) and B. Toën (CNRS, Montpellier).

 

 

Tutti gli interessati sono invitati a partecipare.

 

 

 

                                                                               Classe di Scienze

--------------------------------------------------------------------------------
Valeria Giuliani
Scuola Normale Superiore
Servizio Supporto Attività Didattiche - Scienze
Tel. 050-509260
Fax. 050-509045
Piazza dei Cavalieri, 7
56126 Pisa
E-Mail: v.giuliani at sns.it 
E-Mail: segreteria.scienze at sns.it

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