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In this lecture, we survey a number of recent results and developments regarding the representation theory of infinite-dimensional quantum groups (quantum affine algebras and related algebras), as well as their connections with cluster…

Representation Theory · Mathematics 2025-10-09 David Hernandez

We give a selfcontained introduction to the theory of quantum groups according to Drinfeld highlighting the formal aspects as well as the applications to the Yang-Baxter equation and representation theory. Introductions to Hopf algebras,…

High Energy Physics - Theory · Physics 2009-10-22 T. Tjin

The existence of dual structures in a Yangian Y(g) signify that the latter belongs to multidimensional naturally parametrized variety of Hopf algebras. These varieties have boundaries containing Yangians Y(a) inequivalent to the original…

Quantum Algebra · Mathematics 2007-05-23 V. D. Lyakhovsky , D. N. Ananikian

Starting from a Hopf algebra endowed with an action of a group G by Hopf automorphisms, we construct (by a twisted double method) a quasitriangular Hopf G-coalgebra. This method allows us to obtain non-trivial examples of quasitriangular…

Quantum Algebra · Mathematics 2007-05-23 Alexis Virelizier

We study a certain family of finite-dimensional simple representations over quantum affine superalgebras associated to general linear Lie superalgebras, the so-called fundamental representations: the denominators of rational $R$-matrices…

Quantum Algebra · Mathematics 2016-07-20 Huafeng Zhang

Various aspects of the theory of quantum integrable systems are reviewed. Basic ideas behind the construction of integrable ultralocal and nonultralocal quantum models are explored by exploiting the underlying algebraic structures related…

High Energy Physics - Theory · Physics 2016-09-06 Anjan Kundu

We show how to construct the exact factorized S-matrices of 1+1 dimensional quantum field theories whose symmetry charges generate a quantum affine algebra. Quantum affine Toda theories are examples of such theories. We take into account…

High Energy Physics - Theory · Physics 2009-10-28 Gustav W. Delius , King's College , London

We give a survey of the theory of finite quantum groupoids (weak Hopf algebras), including foundations of the theory and applications to finite depth subfactors, dynamical deformations of quantum groups, and invariants of knots and…

Quantum Algebra · Mathematics 2007-05-23 Dmitri Nikshych , Leonid Vainerman

We first review some invariant theoretic results about the finite subgroups of SU(2) in a quick algebraic way by using the McKay correspondence and quantum affine Cartan matrices. By the way it turns out that some parameters (a,b,h;p,q,r)…

Representation Theory · Mathematics 2007-05-23 Ruedi Suter

Let $\hat{\mathfrak{g}}$ be an untwisted affine Kac-Moody algebra, with its Sklyanin-Drinfel'd structure of Lie bialgebra, and let $\hat{\mathfrak{h}}$ be the dual Lie bialgebra. By dualizing the quantum double construction - via formal…

q-alg · Mathematics 2017-05-17 Fabio Gavarini

We introduce an affine Schur algebra via the affine Hecke algebra associated to Weyl group of affine type C. We establish multiplication formulas on the affine Hecke algebra and affine Schur algebra. Then we construct monomial bases and…

Quantum Algebra · Mathematics 2019-11-11 Zhaobing Fan , Chun-Ju Lai , Yiqiang Li , Li Luo , Weiqiang Wang

This work demonstrates that a complete description of the interaction of matter and all forces, gravitational and non-gravitational, can in fact be realized within a quantum affine algebraic framework. Using the affine group formalism, we…

General Relativity and Quantum Cosmology · Physics 2015-06-16 Ching-Yi Chou , Eyo Ita , Chopin Soo

In this article we use a parametrized version of the FRT construction to construct two new coquasitriangular Hopf algebras. The first one, $\widehat{SL_q(2)}$, is a quantization of the coordinate ring on affine $SL(2)$. We show that there…

Representation Theory · Mathematics 2016-11-16 Valentin Buciumas

We explore the reflection-transmission quantum Yang-Baxter equations, arising in factorized scattering theory of integrable models with impurities. The physical origin of these equations is clarified and three general families of solutions…

High Energy Physics - Theory · Physics 2009-11-10 V. Caudrelier , M. Mintchev , E. Ragoucy , P. Sorba

Affine W-algebras are a somewhat complicated family of (topological) associative algebras associated with a semisimple Lie algebra, quantizing functions on the algebraic loop space of Kostant's slice. They have attracted a great deal of…

Representation Theory · Mathematics 2016-11-16 Sam Raskin

We introduce the $h$-adic quantum vertex algebras associated with the rational $R$-matrix in types $B$, $C$ and $D$, thus generalizing the Etingof--Kazhdan's construction in type $A$. Next, we construct the algebraically independent…

Quantum Algebra · Mathematics 2019-10-21 Marijana Butorac , Naihuan Jing , Slaven Kožić

Two general families of new quantum deformed current algebras are proposed and identified both as infinite Hopf family of algebras, a structure which enable one to define ``tensor products'' of these algebras. The standard quantum affine…

Quantum Algebra · Mathematics 2007-05-23 Liu Zhao

We introduce the notion of $\pi^2$-graded Hopf algebra, where the grading is by the double groupoid of commutative diagrams of a finite groupoid $\pi$. The finite dimensional representations of a $\pi^2$-graded Hopf algebra form a rigid…

Quantum Algebra · Mathematics 2026-05-18 Jelena Anić , Giovanni Felder

Aspects of the algebraic structure and representation theory of the quantum affine superalgebras with symmetrizable Cartan matrices are studied. The irreducible integrable highest weight representations are classified, and shown to be…

q-alg · Mathematics 2009-10-30 R. B. Zhang

We classify finite-dimensional complex Hopf algebras $A$ which are pointed, that is, all of whose irreducible comodules are one-dimensional, and whose group of group-like elements $G(A)$ is abelian such that all prime divisors of the order…

Quantum Algebra · Mathematics 2010-06-29 N. Andruskiewitsch , H. -J. Schneider