香香腐宅

报告题目：Ramification bound of nearby cycles of etale sheaves

报 告 人：胡昊宇（南京大学 副教授）

会议时间：2021/10/30 10:00开始

会议地点： 包玉书9号楼504会议室

报告摘要：In this talk, we discuss a recent work on the ramification bound for the nearby cycle complex of an étale sheaf ramifications along the special fiber of a regular scheme semi-stable over an equal characteristic henselian trait, which extends a main result in a joint work with Teyssier in 2019 and answers a conjecture of Leal in a geometric situation. The main ingredient in this project is a decreasing property of highest Abbes and Saito’s ramification slopes of étale sheaves after pull-backs.

报告人简介：胡昊宇，南京大学数学系副教授。从事代数几何研究，在Crell，IMRN，Selecta Math.，Math. Z.等杂志发表一系列文章。