6 citations · 10 across the 9 of their papers we have counts for
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Unirational algebraic groups and tame ramification
Otto Overkamp, Ismaele Vanni
Let be a complete discrete valuation ring with field of fractions and algebraically closed residue field Let be a smooth connected commutative algebrai…
On Bosch-Lütkebohmert-Raynaud's Conjecture I
Otto Overkamp
Let be a smooth algebraic group over the field of rational functions of an excellent Dedekind scheme of equal characteristic A Néron lft-model of is a smooth sep…
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…
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…
On Jacobians of geometrically reduced curves and their Néron models
Otto Overkamp
We study the structure of Jacobians of geometrically reduced curves over arbitrary (i. e., not necessarily perfect) fields. We show that, while such a group scheme cannot in genera…
Degeneration of Kummer surfaces
Otto Overkamp
We prove that a Kummer surface defined over a complete strictly Henselian discretely valued field of residue characteristic different from 2 admits a strict Kulikov model after…