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math.AG2022
On logarithmic reduction of cohomologically tame elliptic surface
Otto Overkamp, Arne Smeets
We give cohomological criteria for logarithmic good reduction of elliptic surfaces up to modification. Along the way, we prove several more general results about such surfaces in p…
math.AG2022★ 1 cited
Chai's conjecture for semiabelian Jacobians
Otto Overkamp
We prove Chai's conjecture on the additivity of the base change conductor of semiabelian varieties in the case of Jacobians of proper curves. This includes the first infinite famil…