时间：5月21日，周三，16:00-17:00  

主题：Counting l-adic local systems over a curve

报告人：Hongjie Yu 余红杰 (Chinese Academy of Sciences 中国科学院)

摘要：Given a punctured curve over a finite field, Deligne proposed counting irreducible geometric l-adic local systems with prescribed local ramification near each puncture, fixed by Frobenius pullback. This problem is closely related to determining a dimension formula for certain cuspidal automorphic forms over a function field. In this talk, I will present results in these directions and discuss some related questions arising in nearby areas.