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An extensive group-theoretical treatment of linear relativistic field equations on Minkowski spacetime of arbitrary dimension D>2 is presented in these lecture notes. To start with, the one-to-one correspondence between linear relativistic…

High Energy Physics - Theory · Physics 2021-06-15 Xavier Bekaert , Nicolas Boulanger

We classify the finite dimensional irreducible representations of rectangular finite $W$-algebras, i.e., the finite $W$-algebras $U(\mathfrak{g}, e)$ where $\mathfrak{g}$ is a symplectic or orthogonal Lie algebra and $e \in \mathfrak{g}$ is…

Representation Theory · Mathematics 2010-03-11 Jonathan Brown

We prove that irreducible complex representations of finitely generated nilpotent groups are monomial if and only if they have finite weight, which was conjectured by Parshin. Note that we consider (possibly, infinite-dimensional)…

Representation Theory · Mathematics 2018-03-29 Iuliya Beloshapka , Sergey Gorchinskiy

We study finite dimensional algebras that appear as fibers of quantum orders over a given point of variety of center. We present the formula for the number of irreducible representations and check it for it for the algebra of twisted…

Quantum Algebra · Mathematics 2010-10-07 A. N. Panov

Making use of a unified approach to certain classes of induced representations, we establish here a number of detailed spectral theoretic decomposition results. They apply to specific problems from non-commutative harmonic analysis, ergodic…

Functional Analysis · Mathematics 2015-08-13 Palle Jorgensen , Feng Tian

We construct the induced representations of the null-plane quantum Poincar\'e and quantum kappa Galilei algebras in (1+1) dimensions. The induction procedure makes use of the concept of module and is based on the existence of a pair of Hopf…

Quantum Algebra · Mathematics 2011-09-22 O. Arratia , M. A. del Olmo

We study a class of algebras with non-Lie commutation relations whose symplectic leaves are surfaces of revolution: a cylinder or a torus. Over each of such surfaces we introduce a family of complex structures and Hilbert spaces of…

Quantum Algebra · Mathematics 2007-05-23 M. V. Karasev , E. M. Novikova

Let G(K) be the group of K-rational points of a connected adjoint simple algebraic group defined over a non-archimedean local field K. In this paper we classify the unipotent representations of G(K) in terms of the geometry of the Langlands…

Representation Theory · Mathematics 2007-05-23 G. Lusztig

Numerous Lie supergroups do not admit superunitary representations except the trivial one, e.g., Heisenberg and orthosymplectic supergroups in mixed signature. To avoid this situation, we introduce in this paper a broader definition of…

Representation Theory · Mathematics 2017-09-05 Axel de Goursac , Jean-Philippe Michel

In this work, we present straightforward and concrete computations of the unitary irreducible representations of the Euclidean motion group $M(2)$ employing the methods of deformation quantization. Deformation quantization is a quantization…

Mathematical Physics · Physics 2017-09-28 Alexander J. Balsomo , Job A. Nable

In this paper we analyze the structure of some subalgebras of quantized enveloping algebras corresponding to unipotent and solvable subgroups of a simple Lie group G. These algebras have the non--commutative structure of iterated algebras…

High Energy Physics - Theory · Physics 2008-02-03 C. De Concini , Victor G. Kac , C. Procesi

In this paper, we study the tensor product of two unitary irreducible representations, as well as the tensor product of a unitary irreducible representation with a finite-dimensional one, and determine the corresponding Clebsch-Gordan…

Mathematical Physics · Physics 2025-07-21 R. Alvarez-Nodarse , A. Arenas-Gomez

Each irreducible representation of the motion group of the plane has a unique maximal inductive algebra, and it is self adjoint.

Representation Theory · Mathematics 2022-12-08 Promod Sharma , M. K. Vemuri

A parametrization of irreducible representations associated with a regular adjoint orbit of a classical group over finite quotient rings of the ring of integer of a non-dyadic non-archimedean local field is presented. The parametrization is…

Number Theory · Mathematics 2020-09-01 Koichi Takase

We give the full representation theory of the gravitational extended corner symmetry group in two-dimensions. This includes projective representations, which correspond to representations of the quantum corner symmetry group. We find that…

High Energy Physics - Theory · Physics 2025-05-15 Ludovic Varrin

The Weil representation of the symplectic group associated to a finite abelian group of odd order is shown to have a multiplicity-free decomposition. When the abelian group is p-primary, the irreducible representations occurring in the Weil…

Representation Theory · Mathematics 2015-05-19 Kunal Dutta , Amritanshu Prasad

In this paper we describe the new model of the representations of the current groups with a semisimple Lie group of the rank one. In the earlier papers of 70-80-th (Araki, Gelfand-Graev-Vershik) had posed the problem about irreducible…

Representation Theory · Mathematics 2012-04-03 A. M. Vershik , M. I. Graev

In this paper, we obtain an explicit formula for the theta correspondence of unipotent principal-series representations between an even orthogonal and a symplectic group or between general linear groups over a finite field. The formula is…

Representation Theory · Mathematics 2025-12-18 Jia-Jun Ma , Congling Qiu , Zhiwei Yun , JiaLiang Zou

We formulate the unitary rational orbifold conformal field theories in the algebraic quantum field theory framework. Under general conditions, we show that the orbifold of a given unitary rational conformal field theories generates a…

Quantum Algebra · Mathematics 2009-10-31 Feng Xu

We give a survey of several models of irreducible complementary series representations and their limits, special representations, for the groups SU(n,1) and SO(n,1), including new ones. These groups, whose geometrical meaning is well known,…

Representation Theory · Mathematics 2007-05-23 M. I. Graev , A. M. Vershik