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The topological model for quantum computation is an inherently fault-tolerant model built on anyons in topological phases of matter. A key role is played by the braid group, and in this survey we focus on a selection of ways that the…

Quantum Physics · Physics 2022-08-26 Eric C. Rowell

In this survey paper we present the $L$--moves between braids and how they can adapt and serve for establishing and proving braid equivalence theorems for various diagrammatic settings, such as for classical knots, for knots in knot…

Geometric Topology · Mathematics 2011-03-24 Sofia Lambropoulou

Knotoid theory is a generalization of knot theory introduced by Turaev in 2012. In recent years, various invariants of knotoids have been studied. In this paper, we mainly discuss unknotting moves and unknotting numbers of plus-welded…

Geometric Topology · Mathematics 2026-01-28 Fengling Li , Andrei Vesnin , Xuan Yang

We take a close look at a classical magic trick performed with a string, where a trivial knot is seemingly isotoped into a trefoil, and generalize it to a family of magic tricks for transforming the unknot into other knots. We encode such a…

Geometric Topology · Mathematics 2026-04-16 Raphael Appenzeller , José Pedro Quintanilha

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

The unknotting number is the classical invariant of a knot. However, its determination is difficult in general. To obtain the unknotting number from definition one has to investigate all possible diagrams of the knot. We tried to show the…

Geometric Topology · Mathematics 2013-06-25 Kang-Il Ri , Yun-Ho An , Chang-Il Rim

Braidoids generalize the classical braids and form a counterpart theory to the theory of planar knotoids, just as the theory of braids does for the theory of knots. In this paper, we introduce basic notions of braidoids, a closure operation…

Geometric Topology · Mathematics 2021-03-01 Neslihan Gügümcü , Sofia Lambropoulou

In mathematics, a knot is a single strand of string crossed over itself any number of times, and connected at the ends. The Reidemeister Moves have been proven to be the three core moves necessary to fully untangle a knot. Some knots can be…

Geometric Topology · Mathematics 2017-02-08 Dana Foley

This is an expository article on diagrammatic representations of knots and links in various settings via braids.

Geometric Topology · Mathematics 2018-11-29 Sofia Lambropoulou

In this report, I will start by first giving a brief introduction on knots to build some intuition before beginning the more rigorous review in the Literature Review section. There, I will define knot equivalence, the Jones polynomial…

Geometric Topology · Mathematics 2022-02-15 Matthew Stevens

In a previous paper (q-alg/9501022) we suggested some algorithms that could be useful in solving the problem of knot classification. Here we continue this discussion by answering questions raised in that paper and by commenting on practical…

q-alg · Mathematics 2008-02-03 Charilaos Aneziris

In this note, I describe a formalism for treating knots as geometric spaces, and make an application to a simple statistical mechanics computation. The motivation for this study is the natural visual symmetry of the knot, and I describe how…

Statistical Mechanics · Physics 2013-07-04 Robert Kariotis

Knot theory is a study of the embedding of closed circles into three-dimensional Euclidean space, motivated the ubiquity of knots in daily life and human civilization. However, the current knot theory focuses on the topology rather than…

Geometric Topology · Mathematics 2024-11-19 Li Shen , Jian Liu , Guo-Wei Wei

Algorithm of construction of all knots, links with given number of crosses on diagram of knot, link is offered. This algorithm is based on simple proposition, that there is a representation of knot (link) as closure of braid with n threads…

Geometric Topology · Mathematics 2007-05-23 S. S. Serova , S. A. Serov

This note has an experimental nature and contains no new theorems. We introduce certain moves for classical knot diagrams that for all the very many examples we have tested them on give a monotonic complete simplification. A complete…

Geometric Topology · Mathematics 2016-06-07 Carlo Petronio , Adolfo Zanellati

Following the suggestion of arXiv:1407.6319 to lift the knot polynomials for virtual knots and links from Jones to HOMFLY, we apply the evolution method to calculate them for an infinite series of twist-like virtual knots and antiparallel…

High Energy Physics - Theory · Physics 2015-05-11 Ludmila Bishler , Alexei Morozov , Andrey Morozov , Anton Morozov

In previous papers, the author realized the following principle for many knot theories: if a knot diagram is complicated enough then it reproduces itself, i.e., is a subdiagram of any other diagram equivalent to it. This principle is…

Geometric Topology · Mathematics 2015-02-03 Vassily Olegovich Manturov

In the present paper, we consider local moves on classical and welded diagrams: (self-)crossing change, (self-)virtualization, virtual conjugation, Delta, fused, band-pass and welded band-pass moves. Interrelationship between these moves is…

Geometric Topology · Mathematics 2019-10-25 Benjamin Audoux , Paolo Bellingeri , Jean-Baptiste Meilhan , Emmanuel Wagner

In this paper we study the reduction curves of a braid, and how they can be used to decompose the braid into simpler ones in a precise way, which does not correspond exactly to the decomposition given by Thurston theory. Then we study how a…

Geometric Topology · Mathematics 2010-06-14 Juan Gonzalez-Meneses

We discuss the possibility of the existence of finite algorithms that may give distinct knot classes. In particular we present two attempts for such algorithms which seem promising, one based on knot projections on a plane, the other on…

High Energy Physics - Theory · Physics 2008-02-03 Charilaos Aneziris