English

Augmentations are sheaves for Legendrian graphs

Symplectic Geometry 2025-09-29 v1 Algebraic Topology Geometric Topology

Abstract

In this article, associated to a (bordered) Legendrian graph, we study and show the equivalence between two categorical Legendrian isotopy invariants: the augmentation category, a unital AA_{\infty}-category, which lifts the set of augmentations of the associated Chekanov-Eliashberg DGA, and a DG category of constructible sheaves on the front plane, with micro-support at contact infinity controlled by the (bordered) Legendrian graph. In other words, generalizing [21], we prove "augmentations are sheaves" in the singular case.

Keywords

Cite

@article{arxiv.1912.10782,
  title  = {Augmentations are sheaves for Legendrian graphs},
  author = {Byung Hee An and Youngjin Bae and Tao Su},
  journal= {arXiv preprint arXiv:1912.10782},
  year   = {2025}
}

Comments

87 pages

R2 v1 2026-06-23T12:54:29.505Z