2 papers
math.AG2025
An explicit Enriques surface with an automorphism of minimum entropy
Simon Brandhorst, Matthias Zach
We derive explicit equations for the Oguiso-Yu automorphism of minimum topological entropy on a complex Enriques surface. The approach is computer aided and makes use of elliptic f…
math.AG2023
Elliptic Fibrations on Vinberg's Most Algebraic K3 Surface
Simon Brandhorst, Matthias Zach
We explain how to use the computer algebra system OSCAR to find all elliptic fibrations (up to automorphism) on a given surface and compute their Weierstrass models. This is illust…