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The reflection equation of Cherednik is a counterpart to the celebrated Yang-Baxter equation, with importance in the theory of integrable systems. We obtain several new solutions of the reflection equation using braces building on the work…

Quantum Algebra · Mathematics 2019-10-21 Kyriakos Katsamaktsis

We establish a one-to-one correspondence between structure groups of non-degenerate, involutive and braided "set-theoretical" solutions of the quantum Yang-Baxter equation and Garside groups with a certain presentation. Moreover, we show…

Group Theory · Mathematics 2024-12-04 Fabienne Chouraqui

This paper aims to introduce a construction technique of set-theoretic solutions of the Yang-Baxter equation, called strong semilattice of solutions. This technique, inspired by the strong semilattice of semigroups, allows one to obtain new…

Quantum Algebra · Mathematics 2021-09-24 Francesco Catino , Ilaria Colazzo , Paola Stefanelli

We extend our recent work on set-theoretic solutions of the Yang-Baxter or braid relations with new results about their automorphism groups, strong twisted unions of solutions and multipermutation solutions. We introduce and study graphs of…

Quantum Algebra · Mathematics 2007-05-23 Tatiana Gateva-Ivanova , Shahn Majid

We connect properties of set-theoretic solutions to the Yang--Baxter equation to properties of their permutation skew brace. In particular, a variation of the multipermutation level of a solution is presented and we show that it coincides…

Rings and Algebras · Mathematics 2023-05-05 Marco Castelli , Senne Trappeniers

We propose a generic framework to obtain certain types of contracted and centrally extended algebras. This is based on the existence of quadratic algebras (reflection algebras and twisted Yangians), naturally arising in the context of…

High Energy Physics - Theory · Physics 2009-11-13 Anastasia Doikou , Konstadinos Sfetsos

The study of the set-theoretic solutions of the reflection equation, also known as reflection maps, is closely related to that of the Yang-Baxter maps. In this work, we construct reflection maps on various geometrical objects, associated…

Mathematical Physics · Physics 2025-10-09 Luen-Chau Li , Vincent Caudrelier

We investigate a new algebraic structure which always gives rise to a set-theoretic solution of the Yang-Baxter equation. Specifically, a weak (left) brace is a non-empty set $S$ endowed with two binary operations $+$ and $\circ$ such that…

Quantum Algebra · Mathematics 2023-07-10 Francesco Catino , Marzia Mazzotta , Maria Maddalena Miccoli , Paola Stefanelli

We establish a one-to-one correspondence between a class of Garside groups admitting a certain presentation and the structure groups of non-degenerate, involutive and braided set-theoretical solutions of the quantum Yang-Baxter equation. We…

Group Theory · Mathematics 2024-12-04 Fabienne Chouraqui

We involve simultaneously the theory of matched pairs of groups and the theory of braces to study set-theoretic solutions of the Yang-Baxter equation (YBE). We show the intimate relation between the notions of a symmetric group (a braided…

Quantum Algebra · Mathematics 2017-01-03 Tatiana Gateva-Ivanova

Let $r:X^{2}\rightarrow X^{2}$ be a set-theoretic solution of the Yang-Baxter equation on a finite set $X$. It was proven by Gateva-Ivanova and Van den Bergh that if $r$ is non-degenerate and involutive then the algebra $K\langle x \in X…

Group Theory · Mathematics 2018-02-28 Eric Jespers , Arne Van Antwerpen

We establish a correspondence between the invariant subsets of a non-degenerate symmetric set-theoretical solution of the quantum Yang-Baxter equation and the parabolic subgroups of its structure group, equipped with its canonical Garside…

Group Theory · Mathematics 2010-09-20 Fabienne Chouraqui , Eddy Godelle

The set-theoretical reflection equation and its solutions, the reflection maps, recently introduced by two of the authors, is presented in general and then applied in the context of quadrirational Yang-Baxter maps. We provide a method for…

Mathematical Physics · Physics 2013-02-22 V. Caudrelier , N. Crampe , Q. C. Zhang

In analogy with non-degenerate involutive set-theoretic solutions of the Yang-Baxter equation and braces, we define non-degenerate involutive partial set-theoretic solutions and partial braces. We define the structure group and the…

Group Theory · Mathematics 2024-11-20 Fabienne Chouraqui

We examine links between the theory of braces and set theoretical solutions of the Yang-Baxter equation, and fundamental concepts from the theory of quantum integrable systems. More precisely, we make connections with Hecke algebras and we…

Mathematical Physics · Physics 2022-06-30 Anastasia Doikou , Agata Smoktunowicz

We study the class of one-generator solutions to the Yang-Baxter equation, extending some recent results concerning the classes of involutive and multipermutation solutions. Moreover we show the precise relationship between indecomposable…

Quantum Algebra · Mathematics 2025-06-17 Marco Castelli

Extending previous work on $a_2^{(1)}$, we present a set of reflection matrices, which are explicit solutions to the $a_n^{(1)}$ boundary Yang-Baxter equation. Unlike solutions found previously these are multiplet-changing $K$-matrices, and…

High Energy Physics - Theory · Physics 2007-05-23 G. M. Gandenberger

As generalizations of inverse semibraces introduced by Catino, Mazzotta and Stefanelli, Miccoli has introduced regular $\star$-semibraces under the name of involution semibraces and given a sufficient condition under which the associated…

Group Theory · Mathematics 2024-07-18 Qianxue Liu , Shoufeng Wang

In the classification of solutions of the Yang--Baxter equation, there are solutions that are not deformations of the trivial solution (essentially the identity). We consider the algebras defined by these solutions, and the corresponding…

Quantum Algebra · Mathematics 2007-05-23 D. Arnaudon , A. Chakrabarti , V. K. Dobrev , S. G. Mihov

An operator deformed quantum algebra is discovered exploiting the quantum Yang-Baxter equation with trigonometric R-matrix. This novel Hopf algebra along with its $q \to 1$ limit appear to be the most general Yang-Baxter algebra underlying…

Exactly Solvable and Integrable Systems · Physics 2008-11-26 Anjan Kundu