5 citations · 13 across the 7 of their papers we have counts for
4 papers · 1 filter
Extremal divisors on moduli spaces of K3 surfaces
Ignacio Barros, Laure Flapan, Riccardo Zuffetti
We establish criteria for when Noether--Lefschetz divisors generate an extremal ray in the cone of pseudoeffective divisors of an orthogonal modular variety. In particular, we exhi…
Cones of orthogonal Shimura subvarieties and equidistribution
Riccardo Zuffetti
Let X be an orthogonal Shimura variety, and let C_r(X) be the cone generated by the cohomology classes of orthogonal Shimura subvarieties in X of dimension r. We investigate the as…
Cones of special cycles of codimension 2 on orthogonal Shimura varieties
Riccardo Zuffetti
Let be an orthogonal Shimura variety associated to a unimodular lattice. We investigate the polyhedrality of the cone of special cycles of codimension 2 on .…
Strongly ambiguous Hilbert squares of projective K3 surfaces with Picard number one
Riccardo Zuffetti
We provide a criterion for when Hilbert squares of complex projective K3 surfaces with Picard number one are strongly ambiguous. This criterion is the same as [DM, Proposition 3.14…