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math.AG2020★ 4 cited
Automorphism group schemes of bielliptic and quasi-bielliptic surfaces
Gebhard Martin
Bielliptic and quasi-bielliptic surfaces form one of the four classes of minimal smooth projective surfaces of Kodaira dimension . In this article, we determine the automorphism…
math.AG2020★ 7 cited
Weak del Pezzo surfaces with global vector fields
Gebhard Martin, Claudia Stadlmayr
We classify smooth weak del Pezzo surfaces with global vector fields over an arbitrary algebraically closed field of arbitrary characteristic . We give a complete des…
math.AG2020★ 14 cited
Infinitesimal automorphisms of algebraic varieties and vector fields on elliptic surfaces
Gebhard Martin
We give several results concerning the connected component of the automorphism scheme of a proper variety over a field, such as its behaviour with respect to bi…