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If ${\cal D}$ is a definable category then it may contain no nonzero finitely presented modules but, by a result of Makkai, there is a $\varinjlim$-generating set of strictly ${\cal D}$-atomic modules. These modules share some key…

Representation Theory · Mathematics 2024-02-09 Mike Prest

Extending earlier work of the authors, this is the first in a series of papers devoted to the vertex-algebraic structure of principal subspaces of standard modules for twisted affine Kac-Moody algebras. In this part, we develop the…

Quantum Algebra · Mathematics 2014-02-18 Corina Calinescu , James Lepowsky , Antun Milas

Theory of representations of F-algebra is a natural development of the theory of F-algebra. Exploring of morphisms of the representation leads to the concepts of generating set and basis of representation. In the book I considered the…

General Mathematics · Mathematics 2024-10-22 Aleks Kleyn

We give a characterization of $\tau$-rigid modules over Auslander algebras in terms of projective dimension of modules. Moreover, we show that for an Auslander algebra $\Lambda$ admitting finite number of non-isomorphic basic tilting…

Rings and Algebras · Mathematics 2017-02-28 Xiaojin Zhang

In this paper, we extend the notion of Weyl modules for twisted toroidal Lie algebra $\mathcal{T}(\mu)$. We prove that the level one global Weyl modules of $\mathcal{T}(\mu)$ are isomorphic to the tensor product of the level one…

Representation Theory · Mathematics 2024-08-13 Ritesh Kumar Pandey , Sachin S. Sharma

We explicitly describe the category of modules of the Temperley-Lieb algebra $\mathrm{TL}_n(\beta)$ under specialization $\beta=0$ for even $n$ in terms of a quiver algebra, analogous to a result of Berest-Etingof-Ginzburg. In particular,…

Representation Theory · Mathematics 2026-02-13 Eddy Li , Kenta Suzuki

To formalize calculations in linear algebra for the development of efficient algorithms and a framework suitable for functional programming languages and faster parallelized computations, we adopt an approach that treats elements of linear…

Category Theory · Mathematics 2025-08-01 Fatimah Rita Ahmadi

We study the geometric and algebraic properties of the twisted Poisson structures on Lie algebroids, leading to a definition of their modular class and to an explicit determination of a representative of the modular class, in particular in…

Symplectic Geometry · Mathematics 2007-05-23 Yvette Kosmann-Schwarzbach , Camille Laurent-Gengoux

The notion of a Weyl module, previously defined for the untwisted affine algebras, is extended here to the twisted affine algebras. We describe an identification of the Weyl modules for the twisted affine algebras with suitably chosen Weyl…

Representation Theory · Mathematics 2012-12-18 Vyjayanthi Chari , Ghislain Fourier , Prasad Senesi

We construct Wakimoto modules for twisted affine Lie algebras, and interpret the construction in terms of vertex algebras and their twisted modules. Using the Wakimoto realization, we prove the Kac-Kazhdan conjecture on the characters of…

Quantum Algebra · Mathematics 2007-05-23 Matthew Szczesny

A consistent set of six integrable discrete and continuous dynamical systems are suggested corresponding to arbitrary affine Lie algebra. The set contains a system of partial differential equations which can be treated as a version of…

Exactly Solvable and Integrable Systems · Physics 2012-05-31 Rustem N. Garifullin , Ismagil T. Habibullin

Following the work of Gangl, Goncharov and Levin in [GGL], we will give a combinatorial framework for motivic study of iterated integrals on the affine line. We will show that under a certain genericity condition these combinatorial objects…

Number Theory · Mathematics 2007-05-23 Hidekazu Furusho , Amir Jafari

We obtain a characterization of the real Lie algebras admitting abelian complex structures in terms of certain affine Lie algebras $\frak a \frak f \frak f (A)$, where $A$ is a commutative algebra. These affine Lie algebras are natural…

Rings and Algebras · Mathematics 2010-12-23 M. L. Barberis , I. Dotti

Using the bases of principal subspaces for twisted affine Lie algebras except $A_{2l}^{(2)}$ by Butorac and Sadowski, we construct bases of the highest weight modules of highest weight $k\Lambda_0$ and parafermionic spases for the same…

Representation Theory · Mathematics 2021-09-21 Masato Okado , Ryo Takenaka

We determine the Postnikov Tower and Postnikov Invariants of a Crossed Complex in a purely algebraic way. Using the fact that Crossed Complexes are homotopy types for filtered spaces, we use the above "algebraically defined" Postnikov Tower…

Category Theory · Mathematics 2007-05-23 M. Bullejos , E. Faro , M. A. García-Muñoz

We provide upper bounds on the degrees of the coefficients of \v{S}apovalov elements for a simple Lie algebra. If $\fg$ is a contragredient Lie superalgebra and $\gc$ is a positive isotropic root of $\fg,$ we prove the existence and…

Representation Theory · Mathematics 2015-05-04 Ian M. Musson

We introduce a quotient of the affine Temperley-Lieb category that encodes all weight-preserving linear maps between finite-dimensional sl(2)-representations. We study the diagrammatic idempotents that correspond to projections onto…

Representation Theory · Mathematics 2017-01-11 Hoel Queffelec , Paul Wedrich

Extending the `metric spaces' of Lawvere, we study `real metrics', with values in the extended real line. Formally, this ordered set is a symmetric monoidal closed category, and our structures are enriched categories on the latter.…

Algebraic Topology · Mathematics 2026-05-14 Marco Grandis

We classify $n$-representation infinite algebras $\Lambda$ of type \~A. This type is defined by requiring that $\Lambda$ has higher preprojective algebra $\Pi_{n+1}(\Lambda) \simeq k[x_1, \ldots, x_{n+1}] \ast G$, where $G \leq…

Representation Theory · Mathematics 2024-11-25 Darius Dramburg , Oleksandra Gasanova

We use Khovanov-Lauda-Rouquier algebras to categorify a crystal isomorphism between a highest weight crystal and the tensor product of a perfect crystal and another highest weight crystal, all in level 1 type A affine. The nodes of the…

Representation Theory · Mathematics 2015-08-18 Monica Vazirani
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