activity
20192026
most citedThe Kodaira dimension of some moduli spaces of elliptic K3 surfaces

6 citations · 11 across the 13 of their papers we have counts for

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math.AG2025

The Enriques surface of minimal entropy

Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani

Lehmer's number is the smallest dynamical degree greater than that can occur for an automorphism of an algebraic surface. We show that cannot be realized by a…

math.AG2025

On hyperbolic lattices whose reduced automorphism group is virtually abelian

Simon Brandhorst, Markus Kirschmer, Giacomo Mezzedimi

We give a classification of even integral lattices with virtually abelian reduced automorphism group. As a consequence, we complete the classification of K3 surfaces with virtually…

math.AG2024

Enriques surfaces of zero entropy

Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani

We classify Enriques surfaces of zero entropy, or, equivalently, Enriques surfaces with a virtually abelian automorphism group.

math.AG2024

Non-thin rational points for elliptic K3 surfaces

Damián Gvirtz-Chen, Giacomo Mezzedimi

We prove that elliptic K3 surfaces over a number field which admit a second elliptic fibration satisfy the potential Hilbert property. Equivalently, the set of their rational point…

math.AG2023

Nodal Enriques surfaces are Reye congruences

Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani

We show that every classical Enriques surface containing a smooth rational curve is a Reye congruence.

math.AG2022★ 1 cited

Borcherds lattices and K3 surfaces of zero entropy

Simon Brandhorst, Giacomo Mezzedimi

Let be an even, hyperbolic lattice with infinitely many simple -roots. We call a Borcherds lattice if it admits an isotropic vector with bounded inner product with al…

math.AG2022

Enriques surfaces of non-degeneracy 3

Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani

We classify all non-extendable 3-sequences of half-fibers on Enriques surfaces. If the characteristic is different from 2, we prove in particular that every Enriques surface admits…

math.AG2022★ 3 cited

On extra-special Enriques surfaces

Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani

We refine Cossec and Dolgachev's classification of extra-special Enriques surfaces, providing a complete and concise proof.

math.AG2021

A Hilbert Irreducibility Theorem for Enriques surfaces

Damián Gvirtz-Chen, Giacomo Mezzedimi

We define the over-exceptional lattice of a minimal algebraic surface of Kodaira dimension 0. Bounding the rank of this object, we prove that a conjecture by Campana and Corvaja--Z…

math.AG2020★ 1 cited

Unirational moduli spaces of some elliptic K3 surfaces

Mauro Fortuna, Michael Hoff, Giacomo Mezzedimi

We show that the moduli space of -polarized K3 surfaces is unirational for and , and for other several values of $…

math.AG2020★ 6 cited

The Kodaira dimension of some moduli spaces of elliptic K3 surfaces

Mauro Fortuna, Giacomo Mezzedimi

We study the moduli spaces of elliptic K3 surfaces of Picard number at least 3, i.e. -polarized K3 surfaces. Such moduli spaces are proved to be of gen…

math.AG2019

K3 Surfaces of zero entropy admitting an elliptic fibration with only irreducible fibers

Giacomo Mezzedimi

We classify complex K3 surfaces of zero entropy admitting an elliptic fibration with only irreducible fibers. These surfaces are characterized by the fact that they admit a unique…