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The main theorem characterizes all Legendrian negative torus knots in universally tight lens space in the sense of coarse equivalence. Together with Onaran's results on Legendrian positive torus knots, all Legendrian torus knots in…

Geometric Topology · Mathematics 2024-12-09 Han Zhang

We give some conditions on positive braids with at least two full twists that ensure their closure is a hyperbolic knot, with applications to the geometric classification of T-links, arising from dynamics, and twisted torus knots.

Geometric Topology · Mathematics 2022-03-22 Thiago de Paiva

Twisted torus knots and links are given by twisting adjacent strands of a torus link. They are geometrically simple and contain many examples of the smallest volume hyperbolic knots. Many are also Lorenz links. We study the geometry of…

Geometric Topology · Mathematics 2014-05-20 Abhijit Champanerkar , David Futer , Ilya Kofman , Walter Neumann , Jessica S. Purcell

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

In this work, we find a closed form formula for the braid index of an $n$-bridge braid, a class of positive braid knots which simultaneously generalizes torus knots, 1-bridge braids, and twisted torus knots. Our proof is elementary,…

Geometric Topology · Mathematics 2023-09-12 Dane Gollero , Siddhi Krishna , Marissa Loving , Viridiana Neri , Izah Tahir , Len White

We characterize the oriented Seifert-fibered three-manifolds which admit positive, transverse contact structures.

Symplectic Geometry · Mathematics 2014-10-01 Paolo Lisca , Gordana Matic

We present a direct connection between torus knots and Hopfions by finding stable and static solutions of the extended Faddeev-Skyrme model with a ferromagnetic potential term. (P,Q)--torus knots consisting of |Q| sine-Gordon kink strings…

High Energy Physics - Theory · Physics 2013-12-17 Michikazu Kobayashi , Muneto Nitta

In the first part of this paper, we present general results concerning the colorability of torus knots using conjugation quandles over any abstract group. Subsequently, we offer a numerical characterization for the colorability of torus…

Group Theory · Mathematics 2023-08-22 Filippo Spaggiari

We use microlocal sheaf theory to show that if two knots have Legendrian isotopic conormal tori, then the knots are isotopic or mirror images.

Geometric Topology · Mathematics 2021-02-02 Vivek Shende

Every torus knot can be represented as a Fourier-(1,1,2) knot which is the simplest possible Fourier representation for such a knot. This answers a question of Kauffman and confirms the conjecture made by Boocher, Daigle, Hoste and Zheng.…

Geometric Topology · Mathematics 2007-08-28 Jim Hoste

In math.GT/0002110 the author's Theorems 1.1 and 1.2, combined, implied that iterated torus knots are transversally simple. This result is in error and this erratum pin points the error. In "An addendum on iterated torus knots" a more…

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

We obtain the full list of Goeritz invariants of all torus knots and links.

Geometric Topology · Mathematics 2013-12-31 K. Ahara , S. Watanabe

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

S. Satoh has defined a construction to obtain a ribbon torus knot given a welded knot. This construction is known to be surjective. We show that it is not injective. Using the invariant of the peripheral structure, it is possible to provide…

Geometric Topology · Mathematics 2008-08-08 Blake Winter

We extend Howie's characterization of alternating knots to give a topological characterization of toroidally alternating knots, which were defined by Adams. We provide necessary and sufficient conditions for a knot to be toroidally…

Geometric Topology · Mathematics 2016-08-02 Seungwon Kim

If a knot is a nontrivial connected sum of positive torus knots, then it is not concordant to an L-space knot.

Geometric Topology · Mathematics 2018-06-13 Charles Livingston

We investigate the line between tight and overtwisted for surgeries on fibred transverse knots in contact 3-manifolds. When the contact structure $\xi_K$ is supported by the fibred knot $K \subset M$, we obtain a characterisation of when…

Geometric Topology · Mathematics 2016-12-28 James Conway

We show that tori in Engel 4-manifolds behave analogously to knots in contact 3-manifolds: Every torus with trivial normal bundle is isotopic to infinitely many distinct transverse tori, distinguished locally (and globally in the…

Geometric Topology · Mathematics 2025-06-03 Robert E. Gompf

We establish the existence of a secondary Reeb orbit set with quantitative action and linking bounds for any contact form on the standard tight three-sphere admitting the standard transverse positive $T(p,q)$ torus knot as an elliptic Reeb…

Geometric Topology · Mathematics 2025-02-13 Jo Nelson , Morgan Weiler

We classify positive, tight contact structures on closed Seifert fibered 3-manifolds with base S^2, three singular fibers and e_0\geq 0.

Symplectic Geometry · Mathematics 2007-05-23 Paolo Ghiggini , Paolo Lisca , Andras I. Stipsicz