澳门太阳集团(9728·VIP网城)网站入口-欢迎您

学术科研

Geometry & Topology Seminar

Augmentations and sheaves for knot conormals

演讲者：Honghao Gao (Institut Fourier)
时间：2018-02-27 16:00-17:00
地点：慧园3栋 415报告厅

Knot invariants can be defined using Legendrian isotopy invariants of the knot conormal. There are two types of invariants raised in this way: one is the knot contact differential graded algebra together with augmentations associated to this dga, and the other one is the category of simple sheaves microsupported along the knot conormal. Nadler-Zaslow correspondence suggests a connection between the two types of invariants. Moreover, augmentations specialized to “Q=1” have been understood through KCH representations.

I will present a classification result of simple sheaves, and relate it to KCH representations and two-variable augmentation polynomials. I will also present a Radon transform for sheaf categories, and explain how it corresponds to the specialization of Q on the sheaf side.