Hasse-Witt invariants for Calabi-Yau threefolds

Time：Mon., 10:00-11:00 am, Apr. 20, 2026

Venue：C654, Shuangqing Complex Building A

Organizer：Hansheng Diao, Heng Du, Yueke Hu, Bin Xu, Yihang Zhu, Huajie Li

Speaker：Jin Cao

BIMSA-YMSC Tsinghua Number Theory Seminar

Organizers：

Hansheng Diao, Heng Du, Yueke Hu, Bin Xu, Yihang Zhu, Huajie Li

Speaker：

Jin Cao (USTB)

Time：

Mon., 10:00-11:00 am,

Apr. 20, 2026

Venue：

C654, Shuangqing Complex Building A

Title：

Hasse-Witt invariants for Calabi-Yau threefolds

Abstract:

In this talk, we will review different ways to define Hasse–Witt invariants for elliptic curves. We will then discuss their generalizations to Calabi-Yau varieties and address some related problems. This talk is based on joint work with Mohamed Elmi and Hossein Movasati.

DATEApril 19, 2026

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