主讲人：黄一知 教授（美国Rutgers大学）

时  间：6月24日（周五）16：00-17：00

地  点：数学科学学院 311 教室

备  注：摘要：I will present a deformation theory of grading-restricted vertex algebras. Motivations for this deformation theory are from the studies of quantization and Calabi-Yau manifolds. This deformation theory is described by suitable second and third cohomologies of these vertex algebras introduced by me in 2010: An infinitesimal deformation of a grading-restricted vertex algebra is given by a second cohomology class and the obstruction for a formal deformation with a given infinitesimal deformation is a sequence of third cohomology classes.