26 citations · 65 across the 18 of their papers we have counts for
5 papers · 2 filters
The arithmetic local Nori fundamental group
M. Romagny, F. Tonini, L. Zhang
In this paper we introduce the local Nori fundamental group scheme of a reduced scheme or algebraic stack over a perfect field . We give particular attention to the case of fiel…
Moduli of formal torsors
Fabio Tonini, Takehiko Yasuda
We construct the moduli stack of torsors over the formal punctured disk in characteristic p > 0 for a finite group isomorphic to the semidirect product of a p-group and a tame cycl…
Nori fundamental gerbe of essentially finite covers and Galois closure of towers of torsors
M. Antei, I. Biswas, M. Emsalem +2
We prove the existence of a Galois closure for towers of torsors under finite group schemes over a proper, geometrically connected and geometrically reduced algebraic stack ove…
Essentially Finite Vector Bundles on Normal Pseudo-proper Algebraic Stacks
Fabio Tonini, Lei Zhang
Let be a normal, connected and projective variety over an algebraically closed field . It is known that a vector bundle on is essentially finite if and only if it is…
-divided sheaves trivialized by dominant maps are essentially finite
Fabio Tonini, Lei Zhang
By a result of Biswas and Dos Santos, on a smooth and projective variety over an algebraically closed field, a vector bundle trivialized by a proper and surjective map is essential…