報告承辦單位:數學與統計學院
報告內容: Estimates of hyperbolic distance in the punctured sphere
報告人姓名: Toshiyuki Sugawa
報告人所在單位:Tohoku University
報告人職稱/職務及學術頭銜:教授/博導
報告時間:2018-10-25，14:30—15:30
報告地點:云塘校區理科樓A419
報告人簡介: Toshiyuki Sugawa，日本東北大學（Tohoku University）教授，博導；研究方向：Teichmüller理論、擬共形映射、單葉函數；美國數學會會員，日本數學會會員；國際有限維和無限維復分析會議常務副主席；《The Journal of Analysis》、《Bulletin of the Korean Mathematical Society》 、《Banach Journal of Mathematical Analysis》等雜志編委。
報告摘要：It is well recognized that the values of a holomorphic function on the unit diskis controlled by the hyperbolic distance of the domain containing its image.It is, however, not easy in general to estimate the hyperbolic distance of a plane domain.In this talk, we will propose a method to construct a computable quantity which is comparable with the hyperbolic distance of a punctured sphere.This talk is based on joint work with Tanran Zhang (Soochow University) and, partly,Matti Vuorinen (University of Turku).
