报告人:Claire Voisin(法国巴黎索邦大学朱西厄数学研究所)
时间:2024年04月12日 14:00-
地点:数统学院LD402
摘要:Whitney embedding theorem in differential geometry says that a small perturbation f' of a map f between two compact manifolds of dimensions m and n (hence f' is isotopic, and a fortiori homotopic to f) is an embedding if n>2m. I will discuss a related question, asked by Borel and Haefliger, in complex algebraic geometry: can we write the cohomology class of an algebraic subvariety Y of a smooth projective variety X as a combination with integral coefficients of classes of smooth algebraic subvarieties? I will discuss classical and recent results on this question, with emphasis on the case where 2dim Y <dim X, which I recently solved in the affirmative in collaboration with J. Kollár.
简介:Claire Voisin,法国巴黎索邦大学朱西厄数学研究所研究员,法国科学院院士,国际数学家大会1小时报告一次、45分钟报告一次,曾获美国数学会AMS Satter奖、克莱研究奖、邵逸夫奖,欧洲联合国教科文组织奖、克拉福德数学奖,长期从事Kähler流形、代数簇的Hodge理论、镜像对称等研究,解决了Kodaira问题和Green猜想这两个长期未决的代数几何难题。 2024年4月受聘为四川大学荣誉教授。
邀请人:穆春来
欢迎广大师生积极参与!