2 papers
math.NT2026
Pullback Method with Applications to Severi--Brauer Fibrations
Mridul Biswas, Divyasree C Ramachandran, Biswanath Samanta
Given a variety with a suitable Brauer class, we present a general pullback construction that produces varieties that has Brauer--Manin obstruction to the existence of rational poi…
math.AG2025
A geometric perspective on Amitsur's conjecture
Divyasree C Ramachandran
Roquette proved Amitsur's conjecture for Severi-Brauer varieties associated with cyclic algebras using algebraic methods. We present a geometric proof of Roquette's result, providi…