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We give a new proof of the "super Kazhdan-Lusztig conjecture" for the Lie super algebra $\mathfrak{gl}_{n|m}(\mathbb{C})$ as formulated originally by the first author. We also prove for the first time that any integral block of category O…

Representation Theory · Mathematics 2017-11-15 Jonathan Brundan , Ivan Losev , Ben Webster

We introduce (partially) ordered Grothendieck categories and apply results on their structure to the study of categories of representations of the Mackey Lie algebra of infinite matrices $\mathfrak{gl}^M\left(V,V_*\right)$. Here…

Representation Theory · Mathematics 2016-02-22 Alexandru Chirvasitu , Ivan Penkov

This is the first part of a series of two papers aiming to construct a categorification of the braiding on tensor products of Verma modules, and in particular of the Lawrence--Krammer--Bigelow representations. \\ In this part, we categorify…

Quantum Algebra · Mathematics 2021-03-30 Benjamin Dupont , Grégoire Naisse

Let $A$ be the locally unital algebra associated to a cyclotomic oriented Brauer category over an arbitrary algebraically closed field $\Bbbk$ of characteristic $p\ge 0$. The category of locally finite dimensional representations of $A $ is…

Representation Theory · Mathematics 2021-07-06 Mengmeng Gao , Hebing Rui , Linliang Song

We construct a model for the tensor product of the regular 2-representation of the enveloping algebra of $\mathfrak{sl}_2^+$ with the vector 2-representation, based on the $\infty$-categorical definition of the second author. Our model…

Representation Theory · Mathematics 2025-11-20 Mark Ebert , Raphael Rouquier

In this paper, we propose an axiomatic definition for a tensor product categorification. A tensor product categorification is an abelian category with a categorical action of a Kac-Moody algebra g in the sense of Rouquier or Khovanov-Lauda…

Representation Theory · Mathematics 2025-04-28 Ivan Losev , Ben Webster

The purpose of this paper is to study categorifications of tensor products of finite dimensional modules for the quantum group for sl(2). The main categorification is obtained using certain Harish-Chandra bimodules for the complex Lie…

Quantum Algebra · Mathematics 2007-06-13 Igor Frenkel , Mikhail Khovanov , Catharina Stroppel

In this note we present a complete analysis of finite dimensional representations of the Lie superalgebra sl(2|1). This includes, in particular, the decomposition of all tensor products into their indecomposable building blocks. Our…

High Energy Physics - Theory · Physics 2008-11-26 Gerhard Gotz , Thomas Quella , Volker Schomerus

The Lie algebra $gl(V)$ is the Lie algebra of all endomorphisms of a countable-dimensional complex vector space $V$. We define a tensor category of topological representations of the Lie algebra $gl(V)$, so that $V$, its dual and the…

Representation Theory · Mathematics 2022-06-02 Francesco Esposito , Ivan Penkov

The authors continue a series of articles studying certain unitary representations of the Richard Thompson groups $F,T,V$ called Pythagorean. They all extend to the Cuntz algebra $\mathcal{O}$ and conversely all representations of…

Operator Algebras · Mathematics 2024-08-23 Arnaud Brothier , Dilshan Wijesena

In this paper we completely classify irreducible tensor products of covering groups of symmetric and alternating groups in characteristic $\not=2$.

Representation Theory · Mathematics 2021-05-10 Lucia Morotti

We consider typical finite dimensional complex irreducible representations of a basic classical simple Lie superalgebra, and give a sufficient condition on when unique factorization of finite tensor products of such representations hold. We…

Representation Theory · Mathematics 2024-04-02 Abhishek Das , Santosha Pattanayak

We describe the algebraic ingredients of a proof of the conjecture of Frenkel and Ip that the category of positive representations $\mathcal{P}_\lambda$ of the quantum group $U_q(\mathfrak{sl}_{n+1})$ is closed under tensor products. Our…

Representation Theory · Mathematics 2017-08-29 Gus Schrader , Alexander Shapiro

We give universal upper bounds on the relative dimensions of isotypic components of a tensor product of the linear group GL(n) representations and universal upper bounds on the relative dimensions of irreducible components of a tensor…

Representation Theory · Mathematics 2019-02-27 Benoît Collins , Hun Hee Lee , Piotr Śniady

We consider the monoidal subcategory of finite dimensional representations of $U_q(\mathfrak{gl}(1|1))$ generated by the vector representation, and we provide a diagram calculus for the intertwining operators, which allows to compute…

Representation Theory · Mathematics 2015-01-12 Antonio Sartori

We give a new construction of tensor product gamma factors for a pair of irreducible representations of $\operatorname{GL}_c\left(\mathbb{F}_q\right)$ and $\operatorname{GL}_k\left(\mathbb{F}_q\right)$. This construction is a finite field…

Representation Theory · Mathematics 2026-02-25 Oded Carmon , Elad Zelingher

We consider non-trivial irreducible tensor products of modular representations of a symmetric group $S_n$ in characteristic 2 for even $n$ completing the proof of a classification conjecture of Gow and Kleshchev about such products.

Representation Theory · Mathematics 2018-04-04 Lucia Morotti

We describe the tensor products of two irreducible linear complex representations of the finite general linear group G = GL(3,q) in terms of induced representations by linear characters of maximal torii and also in terms of Gelfand-Graev…

Representation Theory · Mathematics 2009-01-06 L. Aburto-Hageman , J. Pantoja , J. Soto-Andrade

The aim of this work is to study finite dimensional representations of the Lie superalgebra psl(2|2) and their tensor products. In particular, we shall decompose all tensor products involving typical (long) and atypical (short)…

High Energy Physics - Theory · Physics 2007-05-23 Gerhard Gotz , Thomas Quella , Volker Schomerus

In a recent paper, the author defined an operation of tensor product for a large class of $2$-representations of $\mathcal{U}^{+}$, the positive half of the $2$-category associated to $\mathfrak{sl}_{2}$. In this paper, we prove that the…

Representation Theory · Mathematics 2024-01-08 Matthew McMillan
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