activity
20192025
most citedAlmost ordinary abelian varieties over finite fields

13 citations · 13 across the 7 of their papers we have counts for

collaborators

7 papers

math.NT2025

-adic hyperbolicity for Shimura varieties and period images

Benjamin Bakker, Abhishek Oswal, Ananth N. Shankar +1

We prove that Shimura varieties and geometric period images satisfy a -adic extension property for large enough primes . More precisely, let $\mathsf{D}^{\times}\subset \math…

math.NT2025

p-adic Borel extension for local Shimura varieties

Abhishek Oswal, Georgios Pappas

We show that the moduli spaces of Scholze's -adic shtukas with framing satisfy a -adic rigid analytic version of Borel's extension theorem. In particular, this holds for loca…

math.NT2023

-adic hyperbolicity for moduli spaces of abelian motives

Abhishek Oswal, Ananth N. Shankar, Xinwen Zhu +1

We prove that Shimura varieties of abelian type satisfy a -adic Borel-extension property over discretely valued fields. More precisely, let denote the rigid-analyti…

math.NT2022

Lifts of supersingular abelian varieties with small Mumford-Tate groups

Yeuk Hay Joshua Lam, Abhishek Oswal

We investigate to what extent an abelian variety over a finite field can be lifted to one in characteristic zero with small Mumford-Tate group. We prove that supersingular abelian…

math.AG2022

Bi-algebraicity in the rank one Riemann--Hilbert correspondence via o-minimality

Abhishek Oswal

For a smooth, projective, complex algebraic variety , the Riemann--Hilbert correspondence establishes a complex analytic isomorphism between the `Betti moduli space' of rank …

math.AG2020

A non-archimedean definable Chow theorem

Abhishek Oswal

Peterzil and Starchenko have proved the following surprising generalization of Chow's theorem: A closed analytic subset of a complex algebraic variety that is definable in an o-min…

math.NT2019★ 13 cited

Almost ordinary abelian varieties over finite fields

Abhishek Oswal, Ananth N. Shankar

We provide a characterization of almost ordinary abelian varieties over finite fields, and use this characterization to provide lower bounds for the sizes of some almost ordinary i…