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math.AG2021★ 1 cited
Finite subgroups of automorphisms of K3 surfaces
Simon Brandhorst, Tommy Hofmann
We give a complete classification of finite subgroups of automorphisms of K3 surfaces up to deformation. The classification is in terms of Hodge theoretic data associated to certai…
math.NT2021★ 2 cited
Generation of Local Unitary Groups
Simon Brandhorst, Tommy Hofmann, Sven Manthe
Let be a two-dimensional étale algebra over a non-Archimedean local field of characteristic zero. We show that the unitary group of a non-degenerate hermitian lattice over…