Elliptic fibrations on K3 surfaces and Salem numbers of maximal degree
发布人: 曹思圆   发布时间: 2018-06-19   浏览次数: 20

主讲人:  余讯 (天津大学)
时间:2018年6月20日(周三)上午 10:00-11:00
讲座地址:闵行校区数学楼401报告厅
邀请人:杜荣

摘要:
We explain a characterization of the maximal Salem degree of automorphisms of K3 surfaces in terms of elliptic fibrations with infinite automorphism groups. As an application, we show that any supersingular K3 surface in odd characteristic has an automorphism the entropy of which is the natural logarithm of a Salem number of degree 22. In particular, such automorphisms are not geometrically liftable to characteristic 0.
报告人简介:
2006.06 - 2013.05 俄亥俄州立大学 博士
2013.10 - 2014.07 德国波恩马克斯普朗克数学研究所 博士后
2014.08 - 2016.06 韩国浦项科技大学 博士后
2016.07 -  今 天津大学 副教授