1 citations · 1 across the 2 of their papers we have counts for
3 papers
math.AG2025
Singular varieties and infinitesimal non-commutative Witt vectors
Phùng Hô Hai, João Pedro dos Santos, Đào Văn Thinh
Given a projective variety over an algebraically closed field , M. V. Nori introduced in 1976 a group scheme which accounts for principal bundles with finite…
math.AC2024
Fiber criteria for flatness and homomorphisms of flat affine group schemes
Phùng Hô Hai, Hop D. Nguyen, João Pedro dos Santos
A very useful result concerning flatness in Algebraic Geometry is EGA's ``fiber'' criterion. We propose similar fiber criteria to verify flatness of a module while avoiding ``finit…
math.AG2019★ 1 cited
Finite torsors on projective schemes defined over a discrete valuation ring
Phung Ho Hai, Joao Pedro dos Santos
Given a Henselian and Japanese discrete valuation ring and a flat and projective -scheme , we follow the approach of Biswas-dos Santos to introduce a full subcategory of…