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We classify the Legendrian torus knots in S^1\times S^2 with its standard tight contact structure up to Legendrian isotopy.

Geometric Topology · Mathematics 2013-10-08 Feifei Chen , Fan Ding , Youlin Li

We give a complete coarse classification of Legendrian and transverse torus knots in any contact structure on $S^3$.

Geometric Topology · Mathematics 2022-07-01 John B. Etnyre , Hyunki Min , Anubhav Mukherjee

We classify positive transversal torus knots in tight contact structures up to transversal isotopy.

Geometric Topology · Mathematics 2014-11-11 John B. Etnyre

In this note, we first classify all topological torus knots lying on the Heegaard torus in lens spaces, and then we study Legendrian representatives of these knots. We classify oriented positive Legendrian torus knots in the universally…

Geometric Topology · Mathematics 2017-10-02 Sinem Onaran

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

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

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

In this paper, we present a complete coarse classification of non-loose Legendrian and transverse torus knots in any contact structure on $S^1\times S^2$.

Geometric Topology · Mathematics 2025-12-29 Jiaxin Huang , Youlin Li , Zaiting Xu

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 prove some classification results for tight contact structure in the 3-space, -ball and -sphere that are invariant with respect to some arbitrary involution, that is conjugated to the standard rotation around the x-axis. Unlike the…

Geometric Topology · Mathematics 2026-01-21 Mirko Torresani

We present an atlas of Legendrian knots in standard contact three-space. This gives a conjectural Legendrian classification for all knots with arc index at most 9, including alternating knots through 7 crossings and nonalternating knots…

Symplectic Geometry · Mathematics 2013-05-08 Wutichai Chongchitmate , Lenhard Ng

The paper deals with topologically trivial Legendrian knots in tight and overtwisted contact 3-manifolds. The first part contains a thorough exposition of the proof of the classification of topologically trivial Legendrian knots (i.e.…

Geometric Topology · Mathematics 2008-11-16 Y. Eliashberg , M. Fraser

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

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 this article we classify up to isotopy tight contact structures on Seifert manifolds over the torus with one singular fibre.

Geometric Topology · Mathematics 2014-10-01 Paolo Ghiggini

Two of the basic questions in contact topology are which manifolds admit tight contact structures, and on those that do, can we classify such structures. We present the first such classification on an infinite family of (mostly) hyperbolic…

Geometric Topology · Mathematics 2021-01-05 James Conway , Hyunki Min

We prove that every Legendrian knot in the tight contact structure of the 3-sphere is determined by the contactomorphism type of its exterior. Moreover, by giving counterexamples we show this to be not true for Legendrian links in the tight…

Geometric Topology · Mathematics 2026-02-10 Marc Kegel

We construct an enhanced version of knot contact homology, and show that we can deduce from it the group ring of the knot group together with the peripheral subgroup. In particular, it completely determines a knot up to smooth isotopy. The…

Symplectic Geometry · Mathematics 2021-02-02 Tobias Ekholm , Lenhard Ng , Vivek Shende

All knots in $R^3$ possess Seifert surfaces, and so the classical Thurston-Bennequin and rotation (or Maslov) invariants for Legendrian knots in a contact structure on $R^3$ can be defined. The definitions extend easily to null-homologous…

Geometric Topology · Mathematics 2015-02-27 Paul A. Schweitzer SJ , Fábio S. Souza

We show that there exists an infinite family of pairwise non-isotopic Legendrian knots in the standard contact 3-sphere whose Stein traces are equivalent. This is the first example of such phenomenon. Different constructions are developed…

Symplectic Geometry · Mathematics 2026-02-10 Roger Casals , John Etnyre , Marc Kegel
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