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A correspondence is studied by H. Matsuda between front projections of Legendrian links in the standard contact structure for 3-space and rectangular diagrams. In this paper, we introduce braided rectangular diagrams, and study a…

Geometric Topology · Mathematics 2007-08-20 Hiroshi Matsuda , William W. Menasco

We study Legendrian singular links up to contact isotopy. Using a special property of the singular points, we define the singular connected sum of Legendrian singular links. This concept is a generalization of the connected sum and can be…

Geometric Topology · Mathematics 2021-01-11 Byung Hee An , Youngjin Bae , Seonhwa Kim

We study the unwrapped Fukaya category of Lagrangian branes ending on a Legendrian knot. Our knots live at contact infinity in the cotangent bundle of a surface, the Fukaya category of which is equivalent to the category of constructible…

Symplectic Geometry · Mathematics 2016-11-01 Vivek Shende , David Treumann , Eric Zaslow

Knot concordance plays a crucial role in the low dimensional topology. We propose a very elementary techniques which allows one to construct a lot of sliceness obstructions for knots in the full torus. Our approach deals with group…

Geometric Topology · Mathematics 2022-03-22 Vassily Olegovich Manturov , Igor Mikhailovich Nikonov

Dehn surgery on a knot determines a dual knot in the surgered manifold, the core of the filling torus. We consider duals of knots in $S^3$ that have a lens space surgery. Each dual supports a contact structure. We show that if a universally…

Geometric Topology · Mathematics 2014-11-14 Christopher R. Cornwell

This is a survey paper on Legendrian and transversal knots for Handbook of Knot Theory.

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

We formulate conjectures generalizing some known results to the category of virtual Legendrian knots. This includes statements relating virtual Legendrian knots to ordinary Legendrian knots, non-existence of positive virtual Legendrian self…

Geometric Topology · Mathematics 2023-07-04 Vladimir Chernov , Rustam Sadykov

The set of real-analytic Legendrian links with respect to the standard contact structure on the 3-sphere $S^3$ corresponds both to the set of totally tangential $\mathbb{C}$-links as defined by Rudolph and to the set of stable knotted field…

Geometric Topology · Mathematics 2024-10-01 Benjamin Bode

Much work has been done recently towards trying to understand the topological significance of being an L-space. Building on work of Rasmussen and Rasmussen, we give a topological characterisation of Floer simple manifolds such that all…

Geometric Topology · Mathematics 2016-03-17 Thomas J. Gillespie

We propose a classification of knots in S^1 x S^2 that admit a longitudinal surgery to a lens space. Any lens space obtainable by longitudinal surgery on some knots in S^1 x S^2 may be obtained from a Berge-Gabai knot in a Heegaard solid…

Geometric Topology · Mathematics 2013-03-01 Kenneth L. Baker , Dorothy Buck , Ana G. Lecuona

The curves of zero intensity of a complex optical field can form knots and links: optical vortex knots. Both theoretical constructions and experiments have so far been restricted to the very small families of torus knots or lemniscate…

Geometric Topology · Mathematics 2024-07-30 Benjamin Bode

In an earlier paper we introduced rectangular diagrams of surfaces and showed that any isotopy class of a surface in the three-sphere can be presented by a rectangular diagram. Here we study transformations of those diagrams and introduce…

Geometric Topology · Mathematics 2021-07-20 Ivan Dynnikov , Maxim Prasolov

Using computational techniques we tabulate prime knots up to five crossings in the solid torus and the infinite family of lens spaces $L(p,q)$. For these knots we calculate the second and third skein module and establish which prime knots…

Geometric Topology · Mathematics 2017-03-16 Boštjan Gabrovšek

Let L be a Legendrian knot in R^3 with the standard contact structure. In [10], a map was constructed from equivalence classes of Morse complex sequences for L, which are combinatorial objects motivated by generating families, to homotopy…

Symplectic Geometry · Mathematics 2016-01-27 Michael B. Henry , Dan Rutherford

Differential graded algebra invariants are constructed for Legendrian links in the 1-jet space of the circle. In parallel to the theory for R^3, Poincare-Chekanov polynomials and characteristic algebras can be associated to such links. The…

Symplectic Geometry · Mathematics 2007-05-23 Lenhard Ng , Lisa Traynor

We compute the homotopy type of the space of embeddings of convex disks with Legendrian boundary into a tight contact $3$-manifold, whenever the sum of the absolute value of the rotation number of the boundary with the Thurston-Bennequin…

Symplectic Geometry · Mathematics 2022-12-29 Eduardo Fernández , Javier Martínez-Aguinaga , Francisco Presas

The lens space $L_{p,q}$ is the orbit space of a $\mathbb{Z}_{p}$-action on the three sphere. We investigate polynomials of two complex variables that are invariant under this action, and thus define links in $L_{p,q}$. We study properties…

Geometric Topology · Mathematics 2020-12-15 Eva Horvat

We study Legendrian singularities arising in complex contact geometry. We define a one-parameter family of bases in the ring of Legendrian characteristic classes such that any Legendrian Thom polynomial has nonnegative coefficients when…

Algebraic Geometry · Mathematics 2011-12-08 Malgorzata Mikosz , Piotr Pragacz , Andrzej Weber

Legendrian Contact Homology (LCH) and its augmentations are important invariants of Legendrian submanifolds, and for Legendrian knots in the standard contact 3-space in particular. We increase understanding of the algebraic structure of LCH…

Symplectic Geometry · Mathematics 2025-09-03 Jiajie Ma , Joshua M. Sabloff

An elementary stabilization of a Legendrian link $L$ in the spherical cotangent bundle $ST^*M$ of a surface $M$ is a surgery that results in attaching a handle to $M$ along two discs away from the image in $M$ of the projection of the link…

Geometric Topology · Mathematics 2014-10-21 V. Chernov , R. Sadykov
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