Cohomologically Symplectic Spaces: Toral Actions and the Gottlieb Group
Cohomologically Symplectic Spaces: Toral Actions and the Gottlieb Group
Aspects of symplectic geometry are explored from a homotopical viewpoint.In particular, the question of whether or not a given toral action is Hamiltonian is shown to be independent of geometry.Rather, a new homotopical obstruction is described which detects when an action is Hamiltonian.This new entity, the AA-invariant, allows many results …