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Using the knot Floer homology filtration, we define invariants associated to a knot in a three-manifold possessing non-vanishing Floer co(homology) classes. In the case of the Ozsvath-Szabo contact invariant we obtain an invariant of knots…

几何拓扑 · 数学 2007-08-06 Matthew Hedden

The Upsilon invariant is a concordance invariant in knot Floer homology. F\"{o}ldv\'{a}ri reconstructed the Upsilon invariant using grid homology. We prove that the Upsilon invariant in knot Floer homology and one in grid homology are…

几何拓扑 · 数学 2024-12-12 Hajime Kubota

Lawrence Roberts, extending the work of Ozsvath-Szabo, showed how to associate to a link, L, in the complement of a fixed unknot, B, in S^3, a spectral sequence from the Khovanov homology of a link in a thickened annulus to the knot Floer…

几何拓扑 · 数学 2013-03-25 J. Elisenda Grigsby , Stephan M. Wehrli

The equivariant rho-invariants studied in this paper are a version of the classical rho-invariants of Atiyah, Patodi, and Singer in the presence of an isometric involution. We compute these rho-invariants for all involutions on the…

几何拓扑 · 数学 2016-09-19 Nima Anvari

We show that the information contained in the associated graded vector space to Gornik's version of Khovanov-Rozansky knot homology is equivalent to a single even integer s_n(K). Furthermore we show that s_n is a homomorphism from the…

几何拓扑 · 数学 2014-10-01 Andrew Lobb

This note contains two remarks about the application of the d-invariant in Heegaard Floer homology and Donaldson's diagonalization theorem to knot theory. The first is the equivalence of two obstructions they give to a 2-bridge knot being…

几何拓扑 · 数学 2015-12-29 Joshua Evan Greene

We use bordered Heegaard Floer homology to compute the tau invariant of a family of satellite knots obtained via twisted infection along two components of the Borromean rings, a generalization of Whitehead doubling. We show that tau of the…

几何拓扑 · 数学 2014-05-02 Adam Simon Levine

In the cabling procedure for HOMFLY polynomials colored HOMFLY polynomials of a knot are obtained from ordinary HOMFLY of the cabled knot with extra twists added. Thus colored polynomials can be seen as relation between HOMFLYs of cabled…

高能物理 - 理论 · 物理学 2014-05-06 Ivan Danilenko

From Khovanov homology, we extract a new lower bound for the Gordian distance of knots, which combines and strengthens the previously existing bounds coming from Rasmussen invariants and from torsion invariants. We also improve the bounds…

几何拓扑 · 数学 2024-09-10 Lukas Lewark , Laura Marino , Claudius Zibrowius

Using the conjugation symmetry on Heegaard Floer complexes, we define a three-manifold invariant called involutive Heegaard Floer homology, which is meant to correspond to $\mathbb{Z}_4$-equivariant Seiberg-Witten Floer homology. Further,…

几何拓扑 · 数学 2017-10-18 Kristen Hendricks , Ciprian Manolescu

We give necessary conditions of a surface-knot to be ribbon concordant to another, by introducing a new variant of the cocycle invariant of surface-knots in addition to using the invariant already known. We demonstrate that twist-spins of…

几何拓扑 · 数学 2007-05-23 J. Scott Carter , Masahico Saito , Shin Satoh

We construct a supercategory that can be seen as a skew version of (thickened) KLR algebras for the type $A$ quiver. We use our supercategory to construct homological invariants of tangles and show that for every link our invariant gives a…

量子代数 · 数学 2020-12-09 Pedro Vaz

We use recently introduced Rasmussen invariant to find knots that are topologically locally-flatly slice but not smoothly slice. We note that this invariant can be used to give a combinatorial proof of the slice-Bennequin inequality.…

几何拓扑 · 数学 2018-06-19 Alexander N. Shumakovitch

We extend the definition of Khovanov-Lee homology to links in connected sums of $S^1 \times S^2$'s, and construct a Rasmussen-type invariant for null-homologous links in these manifolds. For certain links in $S^1 \times S^2$, we compute the…

几何拓扑 · 数学 2022-01-06 Ciprian Manolescu , Marco Marengon , Sucharit Sarkar , Michael Willis

By considering a version of Khovanov homology incorporating both the Lee and $E(-1)$ differentials, we construct a $1$-parameter family of concordance homomorphisms similar to the Upsilon invariant from knot Floer homology. This invariant…

几何拓扑 · 数学 2020-12-14 William Ballinger

We prove that if two knots are concordant, their involutive knot Floer complexes satisfy a certain type of stable equivalence.

几何拓扑 · 数学 2017-08-23 Kristen Hendricks , Jennifer Hom

When restricted to alternating links, both Heegaard Floer and Khovanov homology concentrate along a single diagonal $\delta$-grading. This leads to the broader class of thin links that one would like to characterize without reference to the…

几何拓扑 · 数学 2024-05-22 Artem Kotelskiy , Liam Watson , Claudius Zibrowius

We show that the order of torsion homology classes in Bar-Natan deformation of Khovanov homology is a lower bound for the unknotting number. We give examples of knots that this is a better lower bound than |s(K)/2|, where s(K) is the…

几何拓扑 · 数学 2019-09-18 Akram Alishahi

This is a survey article about knot Floer homology. We present three constructions of this invariant: the original one using holomorphic disks, a combinatorial description using grid diagrams, and a combinatorial description in terms of the…

几何拓扑 · 数学 2016-03-18 Ciprian Manolescu

$R$-coloured knot polynomials for $m$-strand torus knots $Torus_{[m,n]}$ are described by the Rosso-Jones formula, which is an example of evolution in $n$ with Lyapunov exponents, labelled by Young diagrams from $R^{\otimes m}$. This means…

高能物理 - 理论 · 物理学 2018-05-29 A. Anokhina , A. Morozov