Otto Overkamp

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20242026

most citedExistence of global NÃ©ron models beyond semi-abelian varieties

1 citations · 1 across the 2 of their papers we have counts for

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math.AG2026

Unirational algebraic groups and tame ramification

Otto Overkamp, Ismaele Vanni

Let $O_{K}$ be a complete discrete valuation ring with field of fractions $K$ and algebraically closed residue field $k .$ Let $G$ be a smooth connected commutative algebrai…

math.AG2024

On Bosch-LÃ¼tkebohmert-Raynaud's Conjecture I

Otto Overkamp

Let $G$ be a smooth algebraic group over the field of rational functions of an excellent Dedekind scheme $S$ of equal characteristic $p > 0.$ A NÃ©ron lft-model of $G$ is a smooth se…

math.AG2024

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…