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 -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.
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}
}
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87 pages