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In the paper we give a survey of rather new notions and results which generalize classical ones in the theory of braids. Among such notions are various inverse monoids of partial braids. We also observe presentations different from standard…

Group Theory · Mathematics 2013-04-30 Vladimir V. Vershinin

We construct the first examples of normal subgroups of mapping class groups that are isomorphic to non-free right-angled Artin groups. Our construction also gives normal, non-free right-angled Artin subgroups of other groups, such as braid…

Geometric Topology · Mathematics 2023-06-22 Matt Clay , Johanna Mangahas , Dan Margalit

We show that many normal subgroups of the braid group modulo its centre, and of the mapping class group of a sphere with marked points, have the property that their automorphism and abstract commensurator groups are mapping class groups of…

Geometric Topology · Mathematics 2018-05-10 Alan McLeay

This article is a survey on the braid groups, the Artin groups, and the Garside groups. It is a presentation, accessible to non-experts, of various topological and algebraic aspects of these groups. It is also a report on three points of…

Group Theory · Mathematics 2007-11-16 Luis Paris

A generalization of the topological fundamental group is developed in order to exhibit a topologically complete braid group containing Artin's braid group on infinitely many strands with respect to the following notion of convergence: A…

Geometric Topology · Mathematics 2007-05-23 Paul Fabel

The L-move for classical braids extends naturally to trivalent braids. We follow the L-move approach to the Markov Theorem, to prove a one-move Markov-type theorem for trivalent braids. We also reformulate this L-Move Markov theorem and…

Geometric Topology · Mathematics 2020-02-05 Carmen Caprau , Gabriel Coloma , Marguerite Davis

We give an explicit geometric argument that Artin's braid group $B_n$ is right-orderable. The construction is elementary, natural, and leads to a new, effectively computable, canonical form for braids which we call left-consistent canonical…

Geometric Topology · Mathematics 2016-09-07 Roger Fenn , Michael T Greene , Dale Rolfsen , Colin Rourke , Bert Wiest

We introduce framed versions of the $L$-moves and prove a one move theorem for the extension of the Markov theorem for framed braids. We further introduce framed versions of the Hilden and Pure Hilden groups, we give presentations and we…

Geometric Topology · Mathematics 2025-03-10 Anastasios Kokkinakis

This article is about Artin's braid group and its role in knot theory. We set ourselves two goals: (i) to provide enough of the essential background so that our review would be accessible to graduate students, and (ii) to focus on those…

Geometric Topology · Mathematics 2007-05-23 Joan S. Birman , Tara E. Brendle

We define the braid groups of a two-dimensional orbifold and introduce conventions for drawing braid pictures. We use these to realize the Artin groups associated to the spherical Coxeter diagrams A_n, B_n=C_n and D_n and the affine…

Geometric Topology · Mathematics 2007-05-23 Daniel Allcock

We linearize the Artin representation of the braid group given by (right) automorphisms of a free group providing a linear faithful representation of the braid group. This result is generalized to obtain linear representations for the…

High Energy Physics - Theory · Physics 2008-02-03 F. Constantinescu , F. Toppan

It is shown that two braids represent transversally isotopic links if and only if one can pass from one braid to another by conjugations in braid groups, positive Markov moves, and their inverses.

Geometric Topology · Mathematics 2024-12-04 S. Yu. Orevkov , V. V. Shevchishin

This survey consists of a detailed proof of Markov's Theorem based on Joan Birman's book "Braids, Links, and Mapping Class Groups" and Carlo Petronio's classes. It was part of an exam project in A.Y. 2016/2017 for the course Knot Theory.

Geometric Topology · Mathematics 2019-11-12 Matteo Barucco , Nirvana Coppola

Consider the ring $R:=\Q[\tau,\tau^{-1}]$ of Laurent polynomials in the variable $\tau$. The Artin's Pure Braid Groups (or Generalized Pure Braid Groups) act over $R,$ where the action of every standard generator is the multiplication by…

Group Theory · Mathematics 2007-05-23 Simona Settepanella

We review some applications of Gr\"obner-Shirshov bases, including PBW theorems, linear bases of free universal algebras, normal forms for groups and semigroups, extensions of groups and algebras, embedding of algebras.

Rings and Algebras · Mathematics 2015-02-24 L. A. Bokut , Yuqun Chen

Extended welded links are a generalization of Fenn, Rim\'{a}nyi, and Rourke's welded links. Their braided counterpart are extended welded braids, which are closely related to ribbon braids and loop braids. In this paper we prove versions of…

Geometric Topology · Mathematics 2017-05-17 Celeste Damiani

Garside groups are combinatorial generalizations of braid groups which enjoy many nice algebraic, geometric, and algorithmic properties. In this article we propose a method for turning the direct product of a group $G$ by $\mathbb{Z}$ into…

Group Theory · Mathematics 2024-10-17 Thomas Haettel , Jingyin Huang

We study a specific line arrangement obtained from a generic $2$-section of the braid arrangement, and compute the fundamental group of its complement via braid monodromy. We show that the resulting presentation of the fundamental group…

Geometric Topology · Mathematics 2026-01-06 So Yamagata

Twisted knot theory introduced by M. Bourgoin is a generalization of knot theory. It leads us to the notion of twisted virtual braids. In this paper we show theorems for twisted links corresponding to the Alexander theorem and the Markov…

Geometric Topology · Mathematics 2023-10-06 Komal Negi , Madeti Prabhakar , Seiichi Kamada

We give a complete classification of conjugacy stable parabolic subgroups of Artin-Tits groups of spherical type. This answers a question posed by Ivan Marin and generalizes a theorem obtained by Juan Gonz\'alez-Meneses in the specific case…

Group Theory · Mathematics 2019-08-22 Matthieu Calvez , Bruno Cisneros , María Cumplido