2 papers
math.AG2026
Cohomological descent for obstructions to local-global principle
Chang Lv
We develop a formalism of cohomological descent encoding adelic points and obstructions to local-global principle on algebraic stacks. As an application, by constructing new obstru…
cs.IT2024
Nonexistence of generalized bent functions and the quadratic norm form equations
Chang Lv, Yuqing Zhu
We present a new result on the nonexistence of generalized bent functions (GBFs)from (Z/tZ)^n to Z/tZ (called type [n, t]) for a large class. Assume p is an odd prime number. By sh…