The universal abelian variety of dimension five and the geometry of A_6
Gavril Farkas (HU Berlin)  Seminar Algebraic Geometry (SAG)
What 


When 
Jun 11, 2015 from 10:30 am to 11:30 am 
Where  Bonn, HĂ¶rsaal MPI, Vivatsgasse 7 
Contact Name  Sachinidis 
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It is wellknown that the boundary divisor of the moduli space A_g of principally polarized abelian varieties of dimension g is isomorphic to the universal Kummer variety in dimension g1. I will discuss joint work with Verra, in which we establish a structure result for the universal abelian fivefold in terms of discriminant curves of conic bundles over a del Pezzo surface. This gives a very simple unirational parametrization of the boundary divisor of A_6 and a lower bound for the slope of this moduli space.