Andrew Obus

activity

20182026

collaborators

3 papers

math.AG2026

Conductor-Discriminant Inequality for Tamely Ramified Cyclic Covers I

Andrew Obus, Padmavathi Srinivasan, Connor Stewart

We prove conductor-discriminant inequalities for all $Z / n$ -covers of $P^{1}$ defined over discretely valued fields $K$ with excellent valuation ring $O_{K}$ …

math.AG2025

Minimal regular normal crossings models of superelliptic curves

Andrew Obus, Padmavathi Srinivasan

Let $K$ be a complete discretely valued field with perfect residue field $k$ . If $X \to P_{K}^{1}$ is a $Z / d$ -cover with $char k ∤ d$ , we compute the mini…

math.AG2018

Explicit resolution of weak wild quotient singularities on arithmetic surfaces

Andrew Obus, Stefan Wewers

A weak wild arithmetic quotient singularity arises from the quotient of a smooth arithmetic surface by a finite group action, where the inertia group of a point on a closed charact…