张诗卓专题学术报告
2021-01-13 来源:数学科学研究中心活动地点:CMS 201
活动类型:学术报告
主讲人:张诗卓
活动时间:2021-01-15 15:00:00--2021-01-15 16:00:00
活动内容:
张诗卓专题学术报告
报告题目:Kuznetsov's Fano threefold conjectures for quartic double solids and Gushel-Mukai threefolds
报告人:张诗卓(爱丁堡大学)
时间:2021年1月15日(周五)下午3点
地点:数学中心201教室
Abstract:It is conjectured that the non-trivial components, known as Kuznetsov components of derived category of coherent sheaves on an quartic double solid is equivalent to that of Gushel-Mukai threefolds. I will introduce special Gushel-Mukai threefold X and its Fano scheme of twisted cubics on it and prove it is a smooth irreducible projective threefold when X is general and describe its singularity when X is not general. We will show that it is an irreducible component of Bridgeland moduli space of stable objects of a (-2)-class in the Kuznetsov components of the special GM threefolds. I will show that an irreducible component of Bridgeland moduli space of stable objects of a (-1)-class in the Kuznetsov component of an ordinary GM threefold is the minimal model of Fano surface of conics. As a result, we show the Kuznetsov's Fano threefold conjecture is not true.