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We prove that there is a knot $K$ transverse to $\xi_{std}$, the tight contact structure of $S^3$, such that every contact 3-manifold $(M, \xi)$ can be obtained as a contact covering branched along $K$. By contact covering we mean a map…

Geometric Topology · Mathematics 2022-11-02 Jesús Rodríguez-Viorato

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 analyze transverse doubled knots in the standard contact 3-space by using spanned clasp disks. As applications, we will estimate their self-linking number and furthermore we will show that in many cases, transverse twist knots with the…

Geometric Topology · Mathematics 2016-07-28 Ichiro Torisu

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 introduce a special class of knots, called global knots, in F^2 x R and we construct new isotopy invariants, called T-invariants, for global knots. Some T-invariants are of finite type but they cannot be extracted from the generalized…

Geometric Topology · Mathematics 2007-05-23 Thomas Fiedler

We show that there exists a transverse link in the standard contact structures on the 3-sphere such that all contact 3-manifolds are contact branched covers over this transverse link.

Geometric Topology · Mathematics 2022-02-21 Roger Casals , John B. Etnyre

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

Harvey-Kawamuro-Plamenevskaya demonstrated the existence of (transversely) non-isotopic transverse knots such that for every $n>1$ their $n$-fold cyclic branched covers are contactomorphic. In this short note, we construct other examples of…

Geometric Topology · Mathematics 2026-03-30 Marc Kegel , Isacco Nonino

We prove that transverse links in any contact manifold $(M,\xi)$ can be realized as a sub-binding of a compatible open book decomposition. We define the support genus of a transverse link and prove that the support genus of a transverse…

Geometric Topology · Mathematics 2023-02-07 Rima Chatterjee

The main result of this paper is a negative answer to the question: are all transversal knot types transversally simple? An explicit infinite family of examples is given of closed 3-braids that define transversal knot types that are not…

Geometric Topology · Mathematics 2009-03-02 Joan S Birman , William W Menasco

We apply knot Floer homology to exhibit an infinite family of transversely nonsimple prime knots starting with $10_{132}$. We also discuss the combinatorial relationship between grid diagrams, braids, and Legendrian and transverse knots in…

Geometric Topology · Mathematics 2014-10-01 Tirasan Khandhawit , Lenhard Ng

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 exhibit pairs of transverse knots with the same self-linking number that are not transversely isotopic, using the recently defined knot Floer homology invariant for transverse knots and some algebraic refinements of it.

Geometric Topology · Mathematics 2010-03-15 Lenhard Ng , Peter Ozsvath , Dylan Thurston

In every Engel manifold we construct an infinite family of pairwise non-isotopic transverse tori that are all smoothly isotopic. To distinguish the transverse tori in the family we introduce a homological invariant of transverse tori that…

Geometric Topology · Mathematics 2026-02-10 Marc Kegel

We study contact manifolds that arise as cyclic branched covers of transverse knots in the standard contact 3-sphere. We discuss properties of these contact manifolds and describe them in terms of open books and contact surgeries. In many…

Geometric Topology · Mathematics 2007-12-11 Shelly Harvey , Keiko Kawamuro , Olga Plamenevskaya

We classify 3-braid knots whose topological 4-genus coincides with their Seifert genus, using McCoy's twisting method and the Xu normal form. In addition, we give upper bounds for the topological 4-genus of positive and strongly…

Geometric Topology · Mathematics 2024-03-29 Sebastian Baader , Lukas Lewark , Filip Misev , Paula Truöl

We derive new existence results for tight contact structures on certain 3-manifolds which can be presented as surgery along specific knots in S^3. Indeed, we extend our earlier results on knots with maximal Thurston-Bennequin number being…

Symplectic Geometry · Mathematics 2015-03-17 Paolo Lisca , Andras I. Stipsicz

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

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

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 define an invariant of transverse links in the standard contact 3-sphere as a distinguished element of the Khovanov homology of the link. The quantum grading of this invariant is the self-linking number of the link. For knots, this gives…

Geometric Topology · Mathematics 2007-05-23 Olga Plamenevskaya
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