English

Augmented Legendrian cobordism in $J^1S^1$

Symplectic Geometry 2021-11-24 v2

Abstract

We consider Legendrian links and tangles in J1S1J^1S^1 and J1[0,1]J^1[0,1] equipped with Morse complex families over a field F\mathbb{F} and classify them up to Legendrian cobordism. When the coefficient field is F2\mathbb{F}_2 this provides a cobordism classification for Legendrians equipped with augmentations of the Legendrian contact homology DG-algebras. A complete set of invariants, for which arbitrary values may be obtained, is provided by the fiber cohomology, a graded monodromy matrix, and a mod 22 spin number. We apply the classification to construct augmented Legendrian surfaces in J1MJ^1M with dimM=2\dim M = 2 realizing any prescribed monodromy representation, Φ:π1(M,x0)GL(n,F)\Phi:\pi_1(M,x_0) \rightarrow \mathit{GL}(\mathbf{n}, \mathbb{F}).

Keywords

Cite

@article{arxiv.2111.10065,
  title  = {Augmented Legendrian cobordism in $J^1S^1$},
  author = {Yu Pan and Dan Rutherford},
  journal= {arXiv preprint arXiv:2111.10065},
  year   = {2021}
}

Comments

48 pages, 27 figures. Comments are welcome

R2 v1 2026-06-24T07:44:30.293Z