2 papers
math.AG2026
Conic bundle threefolds differing by a constant Brauer class and connections to rationality
Sarah Frei, Lena Ji, Soumya Sankar +2
A double cover of ramified over a general -divisor will have the structure of a geometrically standard conic bundle ramified over a sm…
math.AG2025
Arithmetic and birational properties of linear spaces on intersections of two quadrics
Lena Ji, Fumiaki Suzuki
We study rationality questions for Fano schemes of linear spaces on smooth complete intersections of two quadrics, especially over non-closed fields. Our approach is to study hyper…