3 papers
math.AG2026
The Cone Conjecture for Enriques Surfaces in any Characteristic
Simon Brandhorst, Gebhard Martin, Tobias Schnieders
We give a proof of the Morrison-Kawamata cone conjecture for Enriques surfaces independent of their characteristic. It is based on the analysis of certain generically finite morphi…
math.AG2026
On surfaces with smooth projective models over
Fabio Bernasconi, Gebhard Martin, Zsolt Patakfalvi
In this expository article, we prove a birational classification of smooth projective models of surfaces with negative Kodaira dimension over and over more general rin…
math.AG2025
Classification of non--split del Pezzo surfaces of degree
Gebhard Martin, Réka Wagener
Using Fedder's criterion, we classify all non--split del Pezzo surfaces of degree . We give a necessary and sufficient criterion for the -splitting of such del Pezzo surfa…