Rulings for quotients by normal quadratic elements
Develop a framework for rulings on the noncommutative projective quadric Proj A where A = S/w and w ∈ S_2 is a normal quadratic regular element (not necessarily central), and determine how such rulings relate to line modules over A and over S.
References
Question Suppose that S is a Koszul AS regular algebra of global dimension four, and w \in S_2 is a normal regular element. Let A = S/ w . Is there a good notion of rulings on the noncommutative projective quadric Proj A? If so, what is the relationship between such rulings and line modules over A, or S?
— Some Artin-Schelter Regular Algebras From Dual Reflection Groups and their Geometry
(2410.08959 - Goetz et al., 11 Oct 2024) in Section 6.3 (Graded isolated singularities and rulings)