On the projection of exact Lagrangians in locally conformally symplectic geometry

Abstract

In this paper, we construct examples of exact Lagrangians (of "locally conformally symplectic" type) in cotangent bundles of closed manifolds with locally conformally symplectic structures and give conditions under which the projection induces a simple homotopy equivalence between an exact Lagrangian and the $0$-section of the cotangent bundle. This line of questioning follows in the footsteps of Abouzaid and Kragh, and more generally of the Arnol'd conjecture. Notably, we will see that while exact Lagrangians cannot be spheres in this setting, a naive adaptation of the Abouzaid-Kragh theorem does not hold in this generalization.