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We introduce and study knotoids. Knotoids are represented by diagrams in a surface which differ from the usual knot diagrams in that the underlying curve is a segment rather than a circle. Knotoid diagrams are considered up to Reidemeister…

Geometric Topology · Mathematics 2011-04-14 Vladimir Turaev

We give a simple characterization of braids that can be unplaited keeping separately their upper ends and their lower ends tied together

Geometric Topology · Mathematics 2009-07-15 Orlin Stoytchev

The classical Thistlethwaite theorem for links can be phrased as asserting that the Kauffman bracket of a link can be obtained from an evaluation of the Bollob\'as-Riordan polynomial of a ribbon graph associated to one of the link's…

Geometric Topology · Mathematics 2024-12-18 Sergei Chmutov , Qingying Deng , Joanna A. Ellis-Monaghan , Sergei Lando , Wout Moltmaker

A simple braid is a positive braid that can be drawn so that any two strands cross at most once. We prove that as $n \to \infty$, the proportion of simple braids on $n$ strands that have positive topological entropy tends toward $100\%$.…

Geometric Topology · Mathematics 2024-03-15 Luke Robitaille , Minh-Tâm Quang Trinh

We construct ribbon surfaces of Euler characteristic one for several infinite families of alternating 3-braid closures. We also use a twisted Alexander polynomial obstruction to conclude the classification of smoothly slice knots which are…

Geometric Topology · Mathematics 2023-06-22 Vitalijs Brejevs

Laundry surfaces for closed braid diagrams are presented. It is shown that braid diagrams are characterized by linking matrices obtained by lifting cycles from these surfaces. Oriented link types are then characterized by equivalence…

Geometric Topology · Mathematics 2007-05-23 Victor A. Nicholson

Following Goussarov's paper `Interdependent Modifications of Links and Invariants of Finite Degree' [Topology 37 (1998) 595--602] we describe an alternative finite type theory of knots. While (as shown by Goussarov) the alternative theory…

Geometric Topology · Mathematics 2007-05-23 Dror Bar-Natan

We use grid diagrams to present a unified picture of braids, Legendrian knots, and transverse knots.

Geometric Topology · Mathematics 2010-10-05 Lenhard Ng , Dylan Thurston

We establish an isomorphism between the Khovanov-Rozansky triply graded link homology and the geometric triply graded homology due to the authors. Hence we provide an interpretation of the Khovanov-Rozansky homology of the closure of a…

Geometric Topology · Mathematics 2020-10-29 Alexei Oblomkov , Lev Rozansky

In 1997 M.~Khovanov proved that any doodle can be presented as closure of twin, this result is analogue of classical Alexander's theorem for braids and links. We give a description of twins that have equivalent closures, this theorem is…

Algebraic Topology · Mathematics 2018-07-18 Konstantin Gotin

Given a knot or link in the handlebody, $H_g$, of genus $g$ we prove that it can always be represented as the plat closure of a braid in $H_g$. We further establish the Hilden braid group for the handlebody, as a subgroup of the mixed braid…

Geometric Topology · Mathematics 2023-12-19 Paolo Cavicchioli , Sofia Lambropoulou

We discuss different invariants of knots and links that depend on a primitive root of unity. We clarify the definitions of existing invariants with the Reshetikhin-Turaev method, present the generalization of ADO invariants to…

High Energy Physics - Theory · Physics 2022-08-10 Liudmila Bishler

Traditionally, knot theorists have considered projections of knots where there are two strands meeting at every crossing. A multi-crossing is a crossing where more than two strands meet at a single point, such that each strand bisects the…

Geometric Topology · Mathematics 2018-05-14 Daishiro Nishida

We study the degree of polynomial representations of knots. We obtain the lexicographic degree for two-bridge torus knots and generalized twist knots. The proof uses the braid theoretical method developed by Orevkov to study real plane…

Geometric Topology · Mathematics 2014-11-25 Erwan Brugallé , Pierre-Vincent Koseleff , Daniel Pecker

Construction of (colored) knot polynomials for double-fat graphs is further generalized to the case when "fingers" and "propagators" are substituting R-matrices in arbitrary closed braids with m-strands. Original version of arXiv:1504.00371…

High Energy Physics - Theory · Physics 2015-08-31 A. Mironov , A. Morozov

We define plat closure for spherical braids to obtain links in $\mathbb{R}P^3$ and prove that all links in $\mathbb{R}P^3$ can be realized in this manner. Given a spherical braid $\beta$ of $2n$ strands in $\mathbb{R}P^3$ we associate a…

Geometric Topology · Mathematics 2023-11-15 Rama Mishra , Visakh Narayanan

We prove that braid invariants coming from quantum gl(N) separate braids, by recalling that these invariants (properly decomposed) are all Vassiliev invariants, showing that all Vassiliev invariants of braids arise in this way, and…

q-alg · Mathematics 2008-02-03 Dror Bar-Natan

Using the recoupling theory, we define a representation of the pure braid group and show that it is not trivial.

Geometric Topology · Mathematics 2023-04-14 V. O. Manturov , I. M. Nikonov

Topological gauge theories in four dimensions which admit surface operators provide a natural framework for realizing homological knot invariants. Every such theory leads to an action of the braid group on branes on the corresponding moduli…

High Energy Physics - Theory · Physics 2015-05-13 Sergei Gukov

Simple closed curves in the plane can be mapped to nontrivial knots under the action of origami foldings that allow the paper to self-intersect. We show all tame knot types may be produced in this manner, motivating the development of a new…

Geometric Topology · Mathematics 2021-05-05 Joseph Slote , Thomas Bertschinger