Showing math.AGShow all
2 papers · 1 filter
math.AG2024
Essential dimension of isogenies
János Kollár, Ziquan Zhuang
We give a lower bound for the essential dimension of isogenies of complex abelian varieties. The bound is sharp in many cases. In particular, the multiplication-by- map is incom…
math.AG2023
MMP for locally stable families and wall crossing for moduli of stable pairs
Fanjun Meng, Ziquan Zhuang
We construct reduction and wall-crossing morphisms between the moduli spaces of stable pairs as the coefficients vary, generalizing the earlier work of Ascher, Bejleri, Inchiostro…