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Let $UVB_n$ and $UVP_n$ be the unrestricted virtual braid group and the unrestricted virtual pure braid group on n strands respectively. We study the groups $UVB_n$ and $UVP_n$, and our main results are as follows: for $n\geq 5$, we give a…

Geometric Topology · Mathematics 2022-10-21 Stavroula Makri

Virtual knot theory has experienced a lot of nice features that did not appear in classical knot theory, e.g., parity and picture-valued invariants. In the present paper we use virtual knot theory effects to construct new representations of…

Geometric Topology · Mathematics 2023-03-03 V. O. Manturov , I. M. Nikonov

We give a complete classification of homomorphisms from the commutator subgroup of the braid group on $n$ strands to the braid group on $n$ strands when $n$ is at least 7. In particular, we show that each nontrivial homomorphism extends to…

Geometric Topology · Mathematics 2022-03-14 Kevin Kordek , Dan Margalit

We study the algebraic structures of the virtual singular braid monoid, $VSB_n$, and the virtual singular pure braid monoid, $VSP_n$. The monoid $VSB_n$ is the splittable extension of $VSP_n$ by the symmetric group $S_n$. We also construct…

Geometric Topology · Mathematics 2022-04-19 Carmen Caprau , Sarah Zepeda

We combine the newly discovered technique, which computes explicit formulas for the image of an algebraic curve under rational transformation, with techniques that enable to compute braid monodromies of such curves. We use this combination…

Algebraic Geometry · Mathematics 2007-05-23 S. Kaplan , A. Shapiro , M. Teicher

The set of all virtual or classical braid diagrams forms a monoid and gives a natural monoid action on a direct product of ${\mathbb Z}$ called the up-down action. In this paper, we determine the orbit of every tuple of ${\mathbb Z}$ under…

Geometric Topology · Mathematics 2024-12-24 Komal Negi , Ayaka Shimizu , Yoshiro Yaguchi , Madeti Prabhakar

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

For virtual knot theory, the virtual braid group was defined by generalizing the braid group. It was proved that any virtual link can be obtained by the closure of a virtual braid. On the other hand, due to work by Jones et al., it is known…

Geometric Topology · Mathematics 2025-01-16 Yuya Kodama , Akihiro Takano

Multicrossings, which have previously been defined for classical knots and links, are extended to virtual knots and links. In particular, petal diagrams are shown to exist for all virtual knots.

For classical links Ohyama proved an inequality involving the minimal crossing number and the braid index, then motivated from this Takeda showed an analogous inequality for virtual links. In this paper, we are interested in studying…

Geometric Topology · Mathematics 2025-11-05 Gustavo Cardoso , Oscar Ocampo

In the paper, we introduce the notion of a (virtual) multi-switch which generalizes the notion of a (virtual) switch. Using (virtual) multi-switches we introduce a general approach on how to construct representations of (virtual) braid…

Group Theory · Mathematics 2019-07-23 Valeriy Bardakov , Timur Nasybullov

We show that the mapping class group of a handlebody is a virtual duality group, in the sense of Bieri and Eckmann. In positive genus we give a description of the dualising module of any torsion-free, finite-index subgroup of the handlebody…

Geometric Topology · Mathematics 2026-05-15 Dan Petersen , Richard D. Wade

We examine subgroups of locally compact groups that are continuous homomorphic images of connected Lie groups and we give a criterion for being such an image. We also provide a new characterisation of Lie groups and a characterisation of…

General Topology · Mathematics 2024-07-02 Antoni Machowski

We give a complete classification of homomorphisms from the braid group on $n$ strands to the braid group on $2n$ strands when $n$ is at least 5. We also classify endomorphisms of the braid group on 4 strands, as well as homomorphisms from…

Geometric Topology · Mathematics 2023-05-16 Lei Chen , Kevin Kordek , Dan Margalit

In this paper, we define the notion of a virtually symmetric representation of representations of virtual braid groups and prove that many known representations are equivalent to virtually symmetric. Using one such representation, we define…

Geometric Topology · Mathematics 2021-12-13 Valeriy G. Bardakov , Mikhail V. Neshchadim , Manpreet Singh

A virtual link may be defined as an equivalence class of diagrams, or alternatively as a stable equivalence class of links in thickened surfaces. We prove that a minimal crossing virtual link diagram has minimal genus across representatives…

Geometric Topology · Mathematics 2023-01-12 Hans U. Boden , William Rushworth

In the paper we give a survey on braid groups and subjects connected with them. We start with the initial definition, then we give several interpretations as well as several presentations of these groups. Burau presentation for the pure…

Group Theory · Mathematics 2012-02-21 V. V. Vershinin

In this paper, we establish that the arc shift operation on a $n$-component virtual link diagram acts as an unknotting operation when the virtual link is $n$-homogeneous proper, aiding in the classification of \( n \)-component virtual…

Geometric Topology · Mathematics 2025-02-14 Aastha Sahore , Komal Negi , Amrender Singh Gill , Madeti Prabhakar

In \cite{Kim} it is shown that for an oriented surface $S_{g}$ of genus $g$ links in $S_{g} \times S^{1}$ can be presented by virtual diagrams with a decoration, called {\em double lines}. In this paper, first we define braids with double…

Geometric Topology · Mathematics 2025-12-17 Seongjeong Kim

We classify homomorphisms from the braid group on $n$ strands to the pure mapping class group of a nonoriantable surface of genus $g$. For $n\ge 14$ and $g\le 2\lfloor{n/2}\rfloor+1$ every such homomorphism is either cyclic, or it maps…

Geometric Topology · Mathematics 2025-07-18 Michał Stukow , Błażej Szepietowski