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We construct a combinatorial invariant of Legendrian knots in standard contact three-space. This invariant, which encodes rational relative Symplectic Field Theory and extends contact homology, counts holomorphic disks with an arbitrary…

Symplectic Geometry · Mathematics 2015-05-13 Lenhard Ng

We define an algebraic/combinatorial object on the front projection $\Sigma$ of a Legendrian knot called a Morse complex sequence, abbreviated MCS. This object is motivated by the theory of generating families and provides new connections…

Geometric Topology · Mathematics 2014-01-29 Michael Henry

We construct an open book decomposition compatible with a contact structure given by a rational contact surgery on a Legendrian link in the standard contact $S^3$. As an application we show that some rational contact surgeries on certain…

Geometric Topology · Mathematics 2012-06-22 Burak Ozbagci

A connection is made between the Krammer representation and the Birman-Murakami-Wenzl algebra. Inspired by a dimension argument, a basis is found for a certain irrep of the algebra, and relations which generate the matrices are found.…

Representation Theory · Mathematics 2007-05-23 Matthew G. Zinno

We investigate the ramifications of the Legendrian satellite construction on the relation of Lagrangian cobordism between Legendrian knots. Under a simple hypothesis, we construct a Lagrangian concordance between two Legendrian satellites…

Symplectic Geometry · Mathematics 2017-10-04 Yanhan Liu , Joshua M. Sabloff , Matthew Yacavone , Sipeng Zhou

The correspondence between the braid group on a solid torus of arbitrary genus and the algebra of Yang-Baxter and reflection equation operators is shown. A representation of this braid group in terms of $R$-matrices is given. The…

High Energy Physics - Theory · Physics 2008-02-03 C. Schwiebert

In this paper we clarify the relationship between ribbon surfaces of Legendrian graphs and quasipositive diagrams by using certain fence diagrams. As an application, we give an alternative proof of a theorem concerning a relationship…

Geometric Topology · Mathematics 2007-05-23 Sebastian Baader , Masaharu Ishikawa

We consider {\em L-graphs}, that is contact graphs of axis-aligned L-shapes in the plane, all with the same rotation. We provide several characterizations of L-graphs, drawing connections to Schnyder realizers and canonical orders of…

Computational Geometry · Computer Science 2013-03-07 Steven Chaplick , Stephen Kobourov , Torsten Ueckerdt

In this paper, we give a natural braiding on the universal central extension of a crossed module of Lie algebras with a given braiding and construct the universal central extension of a braided crossed module of Lie algebras, showing that,…

Rings and Algebras · Mathematics 2019-11-27 Alejandro Fernández-Fariña , Manuel Ladra

In this paper, via h-principle we prove that there exist contractible positive loops of Legendrian embeddings based at any loose Legendrian submanifold. As an application, we define a new partial order on $\widetilde{Cont}_0(M,\xi)$ and…

Symplectic Geometry · Mathematics 2017-02-14 Guogang Liu

General braided counterparts of classical Clifford algebras are introduced and investigated. Braided Clifford algebras are defined as Chevalley-Kahler deformations of the corresponding braided exterior algebras. Analogs of the spinor…

q-alg · Mathematics 2008-02-03 Mico Durdevic , Zbigniew Oziewicz

Ozsvath and Stipsicz showed that the LOSS invariant is natural under +1 contact surgery. We extend their result and prove the naturality of the LOSS invariant of a Legendrian L under any positive integer contact surgery along another…

Geometric Topology · Mathematics 2024-04-01 Shunyu Wan

We describe a correspondence between augmentations and certain representations of the knot group. The correspondence makes the 2-variable augmentation polynomial into a generalization of the classical $A$-polynomial. It also associates to…

Geometric Topology · Mathematics 2017-06-07 Christopher Cornwell

We show that every quasipositive link has a quasipositive minimal braid representative, partially resolving a question posed by Orevkov. These quasipositive minimal braids are used to show that the maximal self-linking number of a…

Geometric Topology · Mathematics 2018-04-25 Kyle Hayden

We classify Legendrian realisations, up to coarse equivalence, of the Hopf link in the lens spaces L(p,1) with any contact structure.

Symplectic Geometry · Mathematics 2025-10-21 Rima Chatterjee , Hansjörg Geiges , Sinem Onaran

We give an explicit algorithm to Legendrian realize a homologically nontrivial simple closed curve on a ribbon surface of a Legendrian graph in the standard contact structure $(\mathbb{R}^3,\xi_{\rm st})$. As an application, we obtain an…

Geometric Topology · Mathematics 2026-04-10 Eric Stenhede

A previous work of A. Conway and the author introduced $L^2$-Burau maps of braids, which are generalizations of the Burau representation whose coefficients live in a more general group ring than the one of Laurent polynomials. This same…

Geometric Topology · Mathematics 2022-02-10 Fathi Ben Aribi

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 study holomorphic Legendrian curves in the standard holomorphic contact structure on $\mathbb{C}^{2n+1}$ for any $n\in\mathbb{N}$. We provide several approximation and desingularization results which enable us to prove…

Complex Variables · Mathematics 2019-02-20 Antonio Alarcon , Franc Forstneric , Francisco J. Lopez

We associate an open book with any connected plane checkerboard graph, thus providing a common extension of the classes of prime positive braid links and positive tree-like Hopf plumbings. As an application, we prove that the link type of a…

Geometric Topology · Mathematics 2020-03-25 Sebastian Baader , Lukas Lewark , Livio Liechti