2 papers
math.AG2026
Comparing local-global obstructions on algebraic stacks
Chang Lv, Han Wu, Xucheng Zhang
For quotient stacks [X/G] with X a smooth quasi-projective geometrically integral k-variety and G a linear k-group, where k is a number field, we extend some relations between loca…
math.NT2024
Iterated descent obstructions for algebraic stacks
Han Wu, Chang Lv
Base on a conjecture, we prove that for any smooth separated stack of finite type over a number field, its descent obstruction equals its iterated descent obstruction. As a consequ…