English

Upsilon type concordance invariants

Geometric Topology 2019-12-25 v1

Abstract

To a region CC of the plane satisfying a suitable convexity condition we associate a knot concordance invariant ΥC\Upsilon^C. For appropriate choices of the domain this construction gives back some known knot Floer concordance invariants like Rasmussen's hih_i invariants, and the Ozsv\' ath-Stipsicz-Szab\' o upsilon invariant. Furthermore, to three such regions CC, C+C^+ and CC^- we associate invariants ΥC±,C\Upsilon_{C^\pm, C} generalising Kim-Livingston secondary invariant. We show how to compute these invariants for some interesting classes of knots (including alternating and torus knots), and we use them to obstruct concordances to Floer thin knots and algebraic knots.

Keywords

Cite

@article{arxiv.1709.01594,
  title  = {Upsilon type concordance invariants},
  author = {Antonio Alfieri},
  journal= {arXiv preprint arXiv:1709.01594},
  year   = {2019}
}

Comments

16 pages, 2 figures

R2 v1 2026-06-22T21:34:08.339Z