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Iskovskikh Seminar
March 7, 2019 18:00, Moscow, Steklov Mathematical Institute, room 530
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Singular Veronese double cones
K. A. Shramov Steklov Mathematical Institute of Russian Academy of Sciences, Moscow
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Abstract:
Varieties with the largest possible number of isolated
singularities in a given deformation family often have
nice geometric properties. For instance, the Segre cubic, which is
a cubic threefold with 10 nodes, is unique known to be related to certain
moduli spaces of abelian surfaces. Del Pezzo threefolds with
the maximal number of isolated singularities
are double solids branched in Kummer quartic surfaces.
In my talk I will describe the geometry of del Pezzo threefolds of
degree 1 (also known as Veronese double cones) with the maximal
possible number of isolated singularities. Such varieties are nodal and
have 28 singular points. They are in one-to-one correspondence with
smooth plane quartics, and much of their properties can be recovered
from the properties of these quartics.
The talk is based on a joint work in progress with H. Ahmadinezhad, I. Cheltsov and J. Park.
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