Noah Olander

collaborators

3 papers

math.AC2026

When is Frobenius epic?

Javier Carvajal-Rojas, Rankeya Datta, Noah Olander +1

We prove that a homomorphism of rings of prime characteristic is b-nil formally unramified if and only if its relative Frobenius is an epimorphism. We specialize this result under…

math.AG2026

On automorphisms of $p$ -torsion $G_{m}$ -gerbes

Noah Olander

Rouquier proved that for a smooth projective variety $X$ , the group scheme $Pic_{X}^{0} ⋊ Aut_{X}^{0}$ is an invariant of the derived category of $X$ . T…

math.AC2025

A characteristic $p$ analog of formal lifting properties

Rankeya Datta, Noah Olander

A field extension $L / K$ of characteristic $p > 0$ is formally Ã©tale if and only if the relative Frobenius of $L / K$ is an isomorphism. Inspired by this classical result, we explore…

When is Frobenius epic?

On automorphisms of p-torsion Gm​-gerbes

A characteristic p analog of formal lifting properties

On automorphisms of $p$ -torsion $G_{m}$ -gerbes

A characteristic $p$ analog of formal lifting properties