English

A whittled complex for the Khovanov homology of torus links

Geometric Topology 2026-01-15 v1

Abstract

We give an algorithm for reducing the number of generators of the Khovanov chain complex of the torus braid ftnk=(σ1σ2σn1)kft^k_n = (\sigma_1\sigma_2\cdots \sigma_{n-1})^k on nn strands by applying Bar-Natan Gaussian elimination along a distinguished set of Gaussian elimination isomorphisms. We call the resulting complex FTnk\mathcal{FT}^k_n a \emph{whittled complex} for the Khovanov homology of torus braids. Using this algorithm, we provide a bound for the number of generators at a fixed homological degree in our whittled complex.

Keywords

Cite

@article{arxiv.2601.09079,
  title  = {A whittled complex for the Khovanov homology of torus links},
  author = {Carmen Caprau and Nicolle Gonzalez and Christine Ruey Shan Lee and Radmila Sazdanovic},
  journal= {arXiv preprint arXiv:2601.09079},
  year   = {2026}
}

Comments

32 pages, 30 figures. Comments welcome