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In this paper we classify Legendrian and transverse knots in the knot types obtained from positive torus knots by cabling. This classification allows us to demonstrate several new phenomena. Specifically, we show there are knot types that…

Geometric Topology · Mathematics 2014-11-11 John B. Etnyre , Douglas J. LaFountain , Bulent Tosun

In this paper, we study Legendrian realizations of cable links of knot types that are uniformly thick but not Legendrian simple, extending prior work of Dalton, the second author, and Traynor. This leads to new phenomena, such as stabilized…

Geometric Topology · Mathematics 2025-07-14 Rima Chatterjee , John B. Etnyre , Hyunki Min , Thomas Rodewald

In this paper we will show how to classify Legendrian and transverse knots in the knot type of "sufficiently positive" cables of a knot in terms of the classification of the underlying knot. We will also completely explain the phenomena of…

Geometric Topology · Mathematics 2021-10-25 Apratim Chakraborty , John B. Etnyre , Hyunki Min

We give a classification of Legendrian torus links. Along the way, we give the first classification of infinite families of Legendrian links where some smooth symmetries of the link cannot be realized by Legendrian isotopies. We also give…

Geometric Topology · Mathematics 2023-06-26 Jennifer Dalton , John B. Etnyre , Lisa Traynor

We prove that the class of topological knot types that are both Legendrian simple and satisfy the uniform thickness property (UTP) is closed under cabling. An immediate application is that all iterated cabling knot types that begin with…

Geometric Topology · Mathematics 2016-01-20 Douglas J. LaFountain

We study Legendrian knots in a cabled knot type. Specifically, given a topological knot type K, we analyze the Legendrian knots in knot types obtained from K by cabling, in terms of Legendrian knots in the knot type K. As a corollary of…

Symplectic Geometry · Mathematics 2007-06-13 John B. Etnyre , Ko Honda

It is shown that Legendrian (resp. transverse) cable links in the 3-sphere with its standard tight contact structure, i.e. links consisting of an unknot and a cable of that unknot, are classified by their oriented link type and the…

Symplectic Geometry · Mathematics 2007-12-18 Fan Ding , Hansjörg Geiges

A gordian unlink is a finite number of unknots that are not topologically linked, each with prescribed length and thickness, and that cannot be disentangled into the trivial link by an isotopy preserving length and thickness throughout. In…

Geometric Topology · Mathematics 2025-06-06 José Ayala

The Legendrian product of two Legendrian knots, as defined by Lambert-Cole, is a Legendrian torus. We show that this Legendrian torus is a twist spun whenever one of the Legendrian knot components is sufficiently large. We then study…

Symplectic Geometry · Mathematics 2021-05-05 Georgios Dimitroglou Rizell , Roman Golovko

We present classification results for exceptional Legendrian realisations of torus knots. These are the first results of that kind for non-trivial topological knot types. Enumeration results of Ding-Li-Zhang concerning tight contact…

Symplectic Geometry · Mathematics 2021-01-05 Hansjörg Geiges , Sinem Onaran

In Theorem 1.2 of the paper math.GT/0002110 the author claimed to have proved that all transversal knots whose topological knot type is that of an iterated torus knot (we call them cable knots) are transversally simple. That theorem is…

Geometric Topology · Mathematics 2007-05-23 William W. Menasco

A ribbon is, intuitively, a smooth mapping of an annulus $S^1 \times I$ in 3-space having constant width $\varepsilon$. This can be formalized as a triple $(x,\varepsilon, \mathbf{u})$ where $x$ is smooth curve in 3-space and $\mathbf{u}$…

Geometric Topology · Mathematics 2018-08-02 Susan C. Brooks , Oguz Durumeric , Jonathan Simon

Knot contact homology is an invariant of knots derived from Legendrian contact homology which has numerous connections to the knot group. We use basic properties of knot groups to prove that knot contact homology detects every torus knot.…

Geometric Topology · Mathematics 2015-09-08 Cameron Gordon , Tye Lidman

We study the behavior of Legendrian and transverse knots under the operation of connected sums. As a consequence we show that there exist Legendrian knots that are not distinguished by any known invariant. Moreover, we classify Legendrian…

Symplectic Geometry · Mathematics 2007-05-23 John B. Etnyre , Ko Honda

Using convex surfaces and Kanda's classification theorem, we classify Legendrian isotopy classes of Legendrian linear curves in all tight contact structures on $T^3$. Some of the knot types considered in this article provide new examples of…

Geometric Topology · Mathematics 2007-05-23 Paolo Ghiggini

We prove that each overtwisted contact structure has knot types that are represented by infinitely many distinct transverse knots all with the same self-linking number. In some cases, we can even classify all such knots. We also show…

Symplectic Geometry · Mathematics 2012-01-04 John B. Etnyre

We introduce a new braid-theoretic framework with which to understand the Legendrian and transversal classification of knots, namely a Legendrian Markov Theorem without Stabilization which induces an associated transversal Markov Theorem…

Geometric Topology · Mathematics 2015-06-18 Douglas J. LaFountain , William W. Menasco

In this paper we give necessary and sufficient conditions for a knot type to admit non-loose Legendrian and transverse representatives in some overtwisted contact structure, classify all non-loose rational unknots in lens spaces, and…

Geometric Topology · Mathematics 2023-10-10 Rima Chatterjee , John B. Etnyre , Hyunki Min , Anubhav Mukherjee

We show that a null-homologous transverse knot K in the complement of an overtwisted disk in a contact 3-manifold is the boundary of a Legendrian ribbon if and only if it possesses a Seifert surface S such that the self-linking number of K…

Geometric Topology · Mathematics 2007-08-09 S. Baader , K. Cieliebak , T. Vogel

We prove that an iterated torus knot type fails the uniform thickness property (UTP) if and only if all of its iterations are positive cablings, which is precisely when an iterated torus knot type supports the standard contact structure. We…

Geometric Topology · Mathematics 2015-03-13 Douglas J. LaFountain
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