亿万先生MR

Effective Gonality Theorem(有效正交性定理)

2025.06.11

投稿:邵奋芬部门:理学院浏览次数:

活动信息

汇报标题 (Title):Effective Gonality Theorem(有效正交性定理)

汇报人 (Speaker):牛文博 教授(美国阿肯色大学)

汇报功夫 (Time):2025年6月10日 (周二)15:40-16:40

汇报地址 (Place):校本部GJ303

约请人(Inviter):毛雪峰

主办部门:理学院数学系

汇报提要:在这一讲中  ,我将会商有效正交性定理。1986年  ,Green-Lazarsfeld提出了gonality猜测  ,以为光滑投影曲线的gonality能够从曲线上一个足够正的线束的权一合集中得到。他们还提出了这种线束可能存在的最幼水平。2015年  ,Ein- Lazarsfeld证了然足够大度线束的猜测  ,但该猜测的有效部门依然宽泛盛开  ,并由Farkas-Kemeny沉新明确表述。在本文中  ,我们成立了权一合子的有效隐没定理  ,它蕴涵了有效的正交性猜测。这项钻研是与Jinhyung Park一路合作获得的。

Abstract:In this talk, I will discuss effective result for gonality theorem. In 1986, Green-Lazarsfeld raised the gonality conjecture asserting that the gonality of a smooth projective curve can be read off from weight-one syzygies of a sufficiently positive line bundle on the curve. They also proposed possible least degree of such a line bundle. In 2015, Ein--Lazarsfeld proved the conjecture for line bundles of sufficiently large degree, but the effective part of the conjecture remained widely open and was reformulated explicitly by Farkas-Kemeny. In this talk, we establish an effective vanishing theorem for weight-one syzygies, which implies the effective gonality conjecture. This is a joint work with Jinhyung Park.

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