English

Microlocal Morse theory of wrapped Fukaya categories

Symplectic Geometry 2023-12-12 v3

Abstract

The Nadler--Zaslow correspondence famously identifies the finite-dimensional Floer homology groups between Lagrangians in cotangent bundles with the finite-dimensional Hom spaces between corresponding constructible sheaves. We generalize this correspondence to incorporate the infinite-dimensional spaces of morphisms 'at infinity', given on the Floer side by Reeb trajectories (also known as "wrapping") and on the sheaf side by allowing unbounded infinite rank sheaves which are categorically compact. When combined with existing sheaf theoretic computations, our results confirm many new instances of homological mirror symmetry. More precisely, given a real analytic manifold MM and a subanalytic isotropic subset Λ\Lambda of its co-sphere bundle SMS^*M, we show that the partially wrapped Fukaya category of TMT^*M stopped at Λ\Lambda is equivalent to the category of compact objects in the unbounded derived category of sheaves on MM with microsupport inside Λ\Lambda. By an embedding trick, we also deduce a sheaf theoretic description of the wrapped Fukaya category of any Weinstein sector admitting a stable polarization.

Keywords

Cite

@article{arxiv.1809.08807,
  title  = {Microlocal Morse theory of wrapped Fukaya categories},
  author = {Sheel Ganatra and John Pardon and Vivek Shende},
  journal= {arXiv preprint arXiv:1809.08807},
  year   = {2023}
}

Comments

87 pages, final version to appear in Annals of Mathematics