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Deformation Theory Seminar

Monday, October 25, 2021 - 2:00pm

Severin Barmeier

Univ Freiburg


University of Pennsylvania


Special zoom meeting Meeting ID: 970 7064 4065 Password: 684001

Abstract: In this talk I will compare several approaches to obtaining a deformation-obstruction calculus for diagrams of associative algebras. As main application, I will explain how this can be used to give an explicit description of deformations of the Abelian category of coherent sheaves on any separated Noetherian scheme, combining classical (commutative) deformations of schemes with quantizations of algebraic Poisson structures. I will also mention sufficient criteria for passing from formal to algebraic deformations. This talk is based on joint with Yaël Frégier and and joint with Zhengfang Wang.