# Morse-Bott cohomology from homological perturbation

 Princeton/IAS Symplectic Geometry Seminar Topic: Morse-Bott cohomology from homological perturbation Speaker: Zhengyi Zhou Affiliation: University of California, Berkeley Date: Monday, November 6 Time/Room: 4:00pm - 5:00pm/West Building Lecture Hall Video Link: https://video.ias.edu/puias/2017/1106-ZhengyiZhou

Abstract: In this talk, I will give a new construction of the Morse-Bott cochain complex, where the underlying vector space is generated by the cohomology of the critical manifolds. This new construction has two nice features: (1) It requires the minimum amount of transversality. (2) The choices made in the construction do not depend on the moduli spaces. I will explain its relation to three other constructions in literature, namely Austin-Braam's push-pull construction, Fukaya's push-pull construction and the cascades construction. I will then discuss the equivariant counterpart and the generalization in the polyfold theory.