The cycle class of the supersingular locus
演讲者
Gerard Van der Geer
时间
2023年10月26日 15:00 至 16:00
地点
YMSC-Jingzhai-304
线上
Zoom 638 227 8222
(BIMSA)
摘要
Deuring gave a classical formula for the number of supersingular elliptic curves in characteristic p. We generalize this to a formula for the cycle class of the supersingular locus in the moduli space of principally polarized abelian varieties
of given dimension g. The formula determines the class up to a multiple and shows that it lies in the tautological ring. We also give the multiple for g up to 4. This is joint work with S. Harashita.