English

Twisting, Stabilization and Bordered Floer homology

Geometric Topology 2025-07-22 v1

Abstract

Consider an unknot cc in S3S^3 and a knot KK in S3N(c){S^3-N(c)}. Twisting the knot KK along cc, or equivalently applying 1m\frac{1}{m}-surgery on cc, produces a family of knots {Km}mZ\{K_m\}_{m \in \mathbb{Z}}. We use bordered Floer homology and the theory of immersed curve invariants to show that for m0|m|\gg0, total dimension of HFK^(Km)\widehat{\mathrm{HFK}}(K_m), τ(Km)\tau(K_{m}) and thickness of KmK_{m} are linear functions of mm. Furthermore, we prove that the extremal coefficients of the Alexander polynomial and extremal knot Floer homologies of KmK_m stabilize as mm goes to infinity. This generalizes results of Chen, Lambert-Cole, Roberts, Van Cott and the author on coherent twist families.

Keywords

Cite

@article{arxiv.2507.15144,
  title  = {Twisting, Stabilization and Bordered Floer homology},
  author = {Soheil Azarpendar},
  journal= {arXiv preprint arXiv:2507.15144},
  year   = {2025}
}

Comments

112 pages with 51 figures. Comments are welcome!

R2 v1 2026-07-01T04:10:18.522Z