The Construction of Virtual Fundamental Class on the Moduli Space of General Type Surfaces
Time: 2023-06-19
Published By: Meng Yu
Speaker(s): Yunfeng Jiang (University of Kansas)
Time: 16:00-17:00 June 20, 2023
Venue: Room 77201, Jingchunyuan 78, BICMR
Abstract: Donaldson conjectured that there should exist a virtual fundamental class on the moduli space of surfaces of general type inspired by the geometry of complex structures on the general type surfaces. In this talk I will present a method to construct the virtual fundamental class on the moduli stack of lci (locally complete intersection) covers over the moduli stack of general type surfaces with only semi-log-canonical singularities. A tautological invariant is defined by taking the integration of the power of the first Chern class of the CM line bundle over the virtual fundamental class. This can be taken as a generalization of the tautological invariants on the moduli space of stable curves to the moduli space of stable surfaces. If time permits, we also talk about the possible methods to construct a virtual fundamental class on the Alexeev moduli space of stable maps from semi-log-canonical surfaces to projective varieties.
