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math.AG2022
On the Tate conjecture for divisors on varieties with in positive characteristics
Paul Hamacher, Ziquan Yang, Xiaolei Zhao
We prove that the Tate conjecture for divisors is ''generically true'' for mod p reductions of complex projective varieties with , under a mild assumption on moduli.…
math.AG2021★ 2 cited
Twisted Derived Equivalences and Isogenies between K3 Surfaces in Positive Characteristic
Daniel Bragg, Ziquan Yang
We study isogenies between K3 surfaces in positive characteristic. Our main result is a characterization of K3 surfaces isogenous to a given K3 surface in terms of certain inte…
math.AG2019★ 4 cited
On Irreducible Symplectic Varieties of -type in Positive Characteristic
Ziquan Yang
We show that there is a good notion of irreducible sympelectic varieties of -type over an arbitrary field of characteristic zero or . Then we construc…