讲座提要：
In 1993, Bershadsky, Cecotti, Ooguri and Vafa predicted a Feynman structure governing the topological string theory of a compact Calabi Yau threefold. In 2006 Yamaguchi and Yau made the BCOV prediction for quintic threefold more explicit, and deduce structural relations from it.
In 2018 both predictions were verified for quintic's Gromov Witten theory via the study of Mixed Spin P (MSP) fields. In this talk I will explain why MSP theory is natural and then report on recent progress in its further applications.
主讲人介绍：
Prof. Chang received a Doctor’s Degree at Stanford University 2002-2007. He had postdoctoral appointment at SISSA (Scuola Internazionale Superiore di Studi Avanzati) in Italy 2007-2009. Prof. Chang joined HKUST in July 2009. His works were mainly on problems in algebraic geometry and complex geometry that come from string theory.
