时间：2018-11-15（周四）下午

地点:  欧阳楼220

题目:   Algebraic dynamics of automorphism groups in positive characteristic

报告人:  Professor . Fei Hu (The University of British Columbia)

时间:    2018-11-15  14:00-15:00

摘要:  The dynamics of automorphism groups of normal complex projective varieties (or compact Kahler manifolds) has been well understood in the sense that the whole automorphism groups satisfy the so-called Tits alternative type theorem.
The key ingredients are the cohomological interpretation of the topological entropy by Gromov and Yomdin, the higher dimensional Hodge--Riemann relations, and the quasi-nef sequences introduced by Zhang.
In this talk, I will present a positive characteristic version of the above Tits alternative type theorem. Instead of working on the /ell-adic (etale) cohomology, I will focus on the numerical spaces of algebraic cycles.
Later, I will briefly discuss a question of Truong about the equivalence of the cohomological dynamical degree and the numerical one (which is what I am using).

题目: The intersection of the preperiodic points

报告人:  Professor . Hexi Ye (Zhejiang University)

时间:    2018-11-15  15:00-16:00

摘要: In this talk, we are going to discuss the intersection of the preperiodic points of rational functions on /P^1.

联系人:  叶和溪 (yehexi@zju.edu.cn)