2 papers
math.NT2026
Vertical unramified Brauer groups of Galois normic bundles
Yufan Liu
We compute the vertical unramified Brauer group of the Galois normic bundles, which are given by . Our main result gives combinatorial formulas f…
math.NT2025
Varieties with prescribed finite unramified Brauer groups and subgroups precisely obstructing the Hasse principle
Yongqi Liang, Yufan Liu
On varieties defined over number fields, we consider obstructions to the Hasse principle given by subgroups of their Brauer groups. Given an arbitrary pair of non-zero finite abeli…