Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoominar

Equivariant Floer Homotopy via Morse-Bott Theory

Floer homotopy type refines the Floer homology by associating a (stable) homotopy type to an Hamiltonian, whose homology gives the Hamiltonian Floer homology. In particular, one expects the existing structures on the latter to lift as well, such as the circle actions. On the other hand, constructing a genuine circle action even in the Morse theory is problematic: one usually cannot choose Morse-Smale pairs/Floer data that is invariant under the circle action. In this talk, we show how to extend the framework of Floer homotopy theory to the Morse-Bott setting, in order to tackle this problem. In the remaining time, we explain how to relate the Floer homotopy type to the free loop spaces of exact Lagrangian submanifolds equivariantly, and discuss applications to recovering information about the topology of the underlying manifold from its symplectic cohomology. Joint work with Laurent Cote.

Date & Time

December 22, 2023 | 9:15am – 10:45am


Remote Access


Yusuf Barış Kartal, University of Edinburgh