4 papers
Nonexistence of degree two rational multisections of conic bundles over the plane
Jeffrey Diller, Lena Ji, Eric Riedl
We prove that a standard conic bundle whose discriminant is very general of degree at least 18 admits no rational multisections of degree two. This…
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…
The K-moduli space of a family of conic bundle threefolds
Kristin DeVleming, Lena Ji, Patrick Kennedy-Hunt +1
We describe the 6-dimensional compact K-moduli space of Fano threefolds in deformation family No 2.18. These Fano threefolds are double covers of bra…
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…