3 papers
math.AG2026
Positive Cones of the Projectivization of a parabolic vector bundle and Their Products over a Curve
Ashima Bansal, Indranil Biswas, Souradeep Majumder
We compute the positive cones of the projectivization of a parabolic vector bundle and the fiber product of two parabolic projective bundles over a smooth complex projective curve.…
math.AG2026
On positive cones of finite quotients of a normal variety
Ashima Bansal, Indranil Biswas, Souradeep Majumder
We study positivity properties of finite flat quotients of normal projective varieties. We show that the numerical groups and positive cones of these quotient varieties are related…
math.AG2026
Artin-Schreier Root Stacks and lifts of group actions
Sujoy Chakraborty, Souradeep Majumder
Let be a connected affine algebraic group defined over a field of positive characteristic. We prove that the action of on a smooth projective variety can be lifted to its a…