時 間：2023年11月17日（周五）下午15：30

地 點：武漢大學數(shù)學會堂

主講人：王詩宬 中國科學院院士

題 目：從平行公理到空間的彎曲

主講人簡介：

王詩宬，數(shù)學家，中國科學院院士，北京大學數(shù)學科學學院教授、博士生導師，北京大學數(shù)學研究所所長。1981年從北京大學碩士畢業(yè)后留校任教；1988年獲得美國加州大學洛杉機分校博士學位；1998年獲得陳省身數(shù)學獎；1999年至2008年擔任北京大學數(shù)學研究所副所長；2002年應邀在國際數(shù)學家大會作45分鐘報告；2005年當選為中國科學院院士；2012年至2015年擔任中國數(shù)學會第十一屆理事會理事長。

王詩宬院士主要研究低維拓撲，涉及幾何群論，不動點，動力系統(tǒng)和代數(shù)拓撲等領域。與合作者取得了如下成果：發(fā)現(xiàn)三維流形中本質(zhì)浸入曲面不能提升成有限覆疊中嵌入曲面的第一個例子；觀察到衛(wèi)星結上循環(huán)手術的障礙，證明了雙曲流形中的浸入本質(zhì)曲面邊界數(shù)的有限性；在有限群作用、手性、流形嵌入、吸引子與流形拓撲間的制約等方面均有頗具創(chuàng)意的研究；特別是開拓和發(fā)展了三維流形間的映射這個研究領域，在探索覆疊度的唯一性、非零度映射的存在性、有限性、標準型及其與三維流形拓撲的相互作用中，有一系列預見和佳作。

Brief Introduction of Professor Shicheng Wang

Dr. Shicheng Wang is a mathematician and an academician of the Chinese Academy of Sciences (CAS). He is a professor and doctoral supervisor at the School of Mathematical Sciences at Peking University, as well as the director of the Institute of Mathematics at Peking University. After obtaining his master's degree from Peking University in 1981, he became a faculty member at the university. In 1988, he earned his Ph.D. from the University of California, Los Angeles, USA.In 1998, he was awarded the Shiing-shen Chern Prize in Mathematics. From 1999 to 2008, he served as the deputy director of the Institute of Mathematics at Peking University. He was an invited speaker at the International Congress of Mathematicians (ICM) in 2002, and was elected as an academician of the Chinese Academy of Sciences in 2005 and served as the Chairman of the 11th Council of the Chinese Mathematical Society from 2012 to 2015.

Dr. Wang’s main research focus lies in low-dimensional topology, encompassing areas such as geometric group theory, fixed point theory, dynamical systems, and algebraic topology. He has achieved the following major results with his collaborators: the discovery of the first example that an immersed essential surface in a 3-manifold cannot be lifted to a surface embedded in a finite covering; the observation of obstructions to cyclic surgeries on satellite knots, along with a proof of the finiteness of the number of boundary slopes of immersed essential surfaces in a hyperbolic 3-manifold; and creative research in areas including finite group actions, chirality, manifold embeddings, and constraints between attractors and manifold topology. Particularly noteworthy is his pioneering work in the mappings between 3-manifolds, which includes a series of insightful and significant contributions to the exploration of the uniqueness of the degree of covering maps, the existence, finiteness, standard types of non-zero degree maps and their interactions with 3-manifold topology.

發(fā)布單位：科學技術發(fā)展研究院

承辦單位：數(shù)學與統(tǒng)計學院

邀請人：楊志堅