报告题目:Symplectic Torelli groups of rational surfaces
报告摘要:A symplectic rational surface (X,\omega), positive if c1(X)|\omega|>0. The positive condition of a rational surface is equivalent to the existence of a divisor D\subset X, such that (X,D) is a log Calabi-Yau surface. We answer affirmatively a long-term open question that Lagrangian spherical Dehn twists generate the symplectic Torelli group Symp_h(X) when X is a positive symplectic Torelli groups.
报 告 人:李天军,北京大学本科,美国哈佛大学博士。现为美国明尼苏达大学数学系教授,研究方向:微分几何,辛几何。
报告时间:2023年7月26日(星期三)上午9:00-11:00
报告地点:数学科学学院321
主办单位:数学科学学院
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