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For a Coxeter system and a representation $V$ of this Coxeter system, Soergel defined a category which is now called the category of Soergel bimodules and proved that this gives a categorification of the Hecke algebra when $V$ is reflection…

Representation Theory · Mathematics 2020-09-23 Noriyuki Abe

We consider a category of modules that admit compatible actions of the commutative algebra of Laurent polynomials and the Lie algebra of divergence zero vector fields on a torus and have a weight decomposition with finite dimensional weight…

Representation Theory · Mathematics 2018-09-20 Yuly Billig , John Talboom

We define a family of universal finite-dimensional highest weight modules for affine Lie algebras, we call these Weyl modules. We conjecture that these are the classical limits of the irreducible finite--dimensional representations of the…

Quantum Algebra · Mathematics 2007-05-23 Vyjayanthi Chari , Andrew Pressley

We define and study the category of symmetric $\mathfrak{sl}_2$-webs. This category is a combinatorial description of the category of all finite dimensional quantum $\mathfrak{sl}_2$-modules. Explicitly, we show that (the additive closure…

Quantum Algebra · Mathematics 2018-09-11 David E. V. Rose , Daniel Tubbenhauer

The finite symplectic group Sp(2g) over the field of two elements has a natural representation on the vector space of Siegel modular forms of given weight for the principal congruence subgroup of level two. In this paper we decompose this…

Algebraic Geometry · Mathematics 2008-05-05 Francesco Dalla Piazza , Bert van Geemen

The centralizer of the image of the diagonal embedding of $U_q(\mathfrak{sl}_2)$ in the tensor product of three irreducible representations is examined in a Schur-Weyl duality spirit. The aim is to offer a description in terms of generators…

Quantum Algebra · Mathematics 2021-09-29 Nicolas Crampé , Luc Vinet , Meri Zaimi

We construct projective (unitary) representations of Hecke groups from the vector spaces associated with the Witten-Reshetikhin-Turaev topological quantum field theory of higher genus surfaces. In particular, we generalize the modular data…

Geometric Topology · Mathematics 2024-11-27 Yuze Ruan

We give a classification of infinite dimensional indecomposable weight modules over the Lie superalgebra $sl(2/1)$.

Quantum Algebra · Mathematics 2007-05-23 Yucai Su

We propose a new family ${\sf Y}_{k,\ell,x,y,[z,w]}$ of modules over the enlarged periodic Temperley--Lieb algebra ${\sf{\cal E}PTL}_N(\beta)$. These modules are built from link states with two marked points, similarly to the modules ${\sf…

Mathematical Physics · Physics 2024-11-13 Yacine Ikhlef , Alexi Morin-Duchesne

We study finite-dimensional representations of hyper loop algebras, i.e., the hyperalgebras over an algebraically closed field of positive characteristic associated to the loop algebra over a complex finite-dimensional simple Lie algebra.…

Representation Theory · Mathematics 2008-02-23 Dijana Jakelic , Adriano Moura

In this paper we study Category $\mcal O$ for the polynomial toroidal Lie algebras and its $S,H$ type subalgebras. We classify irreducible objects of category $\mcal O$ as unique irreducble quotient of standard modules. Surprisingly,…

Representation Theory · Mathematics 2026-04-15 Priyanshu Chakraborty

Trivalent plane graphs are used in various areas of mathematics which relate for instance to the colored Jones polynomial, invariants of 3-manifolds and quantum computation. Their evaluation is based on computations in the Temperley-Lieb…

Quantum Algebra · Mathematics 2013-01-11 Claire Isabelle Levaillant

We present a method of defining projectors in the virtual Temperley-Lieb algebra, that generalizes the Jones-Wenzl projectors in Temperley-Lieb algebra. We show that the projectors have similar properties with the Jones-Wenzl projectors,…

Geometric Topology · Mathematics 2021-03-23 Qingying Deng , Xian'an Jin , Louis H. Kauffman

Let $(W,S)$ be an affine Coxeter system of type $\widetilde{B}$ or $\widetilde{D}$ and ${\rm TL}(W)$ the corresponding generalized Temperley-Lieb algebra. In this paper we define an infinite dimensional associative algebra made of decorated…

Representation Theory · Mathematics 2025-08-14 Riccardo Biagioli , Giuliana Fatabbi , Elisa Sasso

We develop a "Soergel theory" for Bruhat-constructible perverse sheaves on the flag variety $G/B$ of a complex reductive group $G$, with coefficients in an arbitrary field $\Bbbk$. Namely, we describe the endomorphisms of the projective…

Representation Theory · Mathematics 2020-02-19 Roman Bezrukavnikov , Simon Riche

We introduce a type $B$ analogue of the nil Temperley-Lieb algebra in terms of generators and relations, that we call the (extended) nil-blob algebra. We show that this algebra is isomorphic to the endomorphism algebra of a Bott-Samelson…

Representation Theory · Mathematics 2020-12-08 Diego Lobos , David Plaza , Steen Ryom-Hansen

Algebra objects in $\infty$-categories of spans admit a description in terms of $2$-Segal objects. We introduce a notion of span between $2$-Segal objects and extend this correspondence to an equivalence of $\infty$-categories.…

Algebraic Topology · Mathematics 2025-10-30 Jonte Gödicke

Jensen, Su, and Yang described the projective indecomposable modules of the $0$-Schur algebra $\mathbf{S}_0(n,r)$ using its geometric realization. In this paper, the simple modules of $\mathbf{S}_0(n,r)$ are identified by computing the tops…

Representation Theory · Mathematics 2025-11-18 Woo-Seok Jung , Young-Tak Oh

We describe algebraically, diagrammatically and in terms of weight vectors, the restriction of tensor powers of the standard representation of quantum $\mathfrak{sl}_2$ to a coideal subalgebra. We realise the category as module category…

Representation Theory · Mathematics 2024-06-19 Catharina Stroppel , Zbigniew Wojciechowski

The Jones-Wenzl projectors play a central role in quantum topology, underlying the construction of SU(2) topological quantum field theories and quantum spin networks. We construct chain complexes whose graded Euler characteristic is the…

Geometric Topology · Mathematics 2012-03-13 Benjamin Cooper , Vyacheslav Krushkal