星期一, 28 五月, 2007 - 16:00
Prénom de l'orateur :
Dan
Nom de l'orateur :
AVRITZER
Résumé :
The aim of this talk is to construct the coarse moduli space $cM_{qc}(sigma)$ of quadratic line complexes with a fixed Segre symbol $sigma$ as well as the moduli space $cM_{ss}(sigma)$ of the corresponding singular surfaces. We show that the map associating to a quadratic line complex its singular surface induces a morphism $pi: cM_{qc}(sigma)
a cM_{ss}(sigma)$. Finally we deduce that the varieties of cosingular quadratic line complexes are almost always curves.
Institution de l'orateur :
UFMG, Belo Horizonte
Thème de recherche :
Algèbre et géométries
Salle :
04