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BIMSA-YMSC Tsinghua Number Theory Seminar
Ramification of nearby cycles over a geometric base
Ramification of nearby cycles over a geometric base
Organizers
Hansheng Diao
, Heng Du
, Yueke Hu
, Bin Xu
, Yihang Zhu
Speaker
Haoyu Hu
Time
Monday, October 20, 2025 10:00 AM - 11:00 AM
Venue
Shuangqing-B627
Abstract
In this talk, we discuss a ramification bound of nearby cycle complexes for étale sheaves over a DVR base of equal characteristic with imperfect residue field. We also explain an application of the boundedness result to Betti numbers of étale sheaves on affine spaces. This is a joint work with Jean-Baptiste Teyssier.