4 papers
Enriques' characterization of Abelian surfaces in positive characteristic
Jefferson Baudin, Gebhard Martin
Extending Enriques' characterization to algebraically closed fields of characteristic , we show that every smooth projective surface with …
On symmetries of hyperbolic lattices of large rank
Torben Grabbel, Gebhard Martin, Giacomo Mezzedimi +2
For an even, integral hyperbolic lattice , the symmetry group of is the quotient of the group of isometries of by the Weyl subgroup of -reflections. Following Niku…
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…
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.