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We consider the natural Lie algebra structure on the (associative) group algebra of a finite group $G$, and show that the Lie subalgebras associated to natural involutive antiautomorphisms of this group algebra are reductive ones. We give a…

Representation Theory · Mathematics 2008-09-02 Ivan Marin

The cluster category is a triangulated category introduced for its combinatorial similarities with cluster algebras. We prove that a cluster algebra A of finite type can be realized as a Hall algebra, called the exceptional Hall algebra, of…

Representation Theory · Mathematics 2007-05-23 Philippe Caldero , Bernhard Keller

In this paper we introduce the notion of twisted symplectic reflection algebras and describe the category of representations of such an algebra associated to a non-faithful G-action in terms of those for faithful actions of G.

Representation Theory · Mathematics 2007-05-23 Tatyana Chmutova

We study a new class of infinite dimensional Lie algebras, which has important applications to the theory of integrable equations. The construction of these algebras is very similar to the one for automorphic functions and this motivates…

Mathematical Physics · Physics 2009-11-10 S. Lombardo , A. V. Mikhailov

All finite-dimensional Leibniz algebra bimodules of a Lie algebra $\mathfrak{sl}_2$ over a field of characteristic zero are described.

Representation Theory · Mathematics 2021-06-10 Tuuelbay Kurbanbaev , Rustam Turdibaev

A self-contained introduction to infinite dimensional representations over a tame hereditary algebra is provided, assuming a basic knowledge of the category of finite dimensional representations. This includes a complete description of all…

Representation Theory · Mathematics 2026-05-01 Lidia Angeleri Hügel , Andrew Hubery , Henning Krause

We determine all two-dimensional Lie subalgebras of the centreless Virasoro algebra and complete the characterization of all finite dimensional Lie subalgebras of the complex Virasoro algebra.

Rings and Algebras · Mathematics 2014-11-18 Zhihua Chang

We give a brief introduction to (upper) cluster algebras and their quantization using examples. Then we present several important families of bases for these algebras using topological models. We also discuss tropical properties of these…

Representation Theory · Mathematics 2021-11-19 Fan Qin

We give an example of a finite-dimensional algebra with a 2-cluster tilting module and a simple module which has infinite complexity. This answers a question of Erdmann and Holm.

Representation Theory · Mathematics 2022-02-17 René Marczinzik , Laertis Vaso

We determine derived representation type of complete finitely generated local and two-point algebras over an algebraically closed field.

Representation Theory · Mathematics 2008-12-31 Viktor Bekkert , Yuriy Drozd , Vyacheslav Futorny

We discuss the finiteness of (two-term) silting objects. First, we investigate new triangulated categories without silting object. Second, one studies two classes of $\tau$-tilting-finite algebras and give the numbers of their two-term…

Representation Theory · Mathematics 2023-06-22 Takuma Aihara , Takahiro Honma , Kengo Miyamoto , Qi Wang

This is a preliminary draft of Chapters 4-5 of our forthcoming textbook "Introduction to Cluster Algebras." Chapters 1-3 have been posted as arXiv:1608.05735. This installment contains: Chapter 4. New patterns from old Chapter 5. Finite…

Combinatorics · Mathematics 2021-08-31 Sergey Fomin , Lauren Williams , Andrei Zelevinsky

As the first attempt to classify $\tau$-tilting finite two-point algebras, we have determined the $\tau$-tilting finiteness for minimal wild two-point algebras and some tame two-point algebras.

Representation Theory · Mathematics 2021-12-30 Qi Wang

We classify Morita equivalence classes of indecomposable self-injective cellular algebras which have polynomial growth representation type, assuming that the base field has an odd characteristic. This assumption on the characteristic is for…

Representation Theory · Mathematics 2017-07-03 Susumu Ariki , Ryoichi Kase , Kengo Miyamoto , Kentaro Wada

We give a construction of Gorenstein projective $\tau$-tilting modules in terms of tensor products of modules. As a consequence, we give a class of non-self-injective algebras admitting non-trivial Gorenstein projective $\tau$-tilting…

Representation Theory · Mathematics 2022-01-13 Zhi-Wei Li , Xiaojin Zhang

Toroidal Lie algebras are universal central extentions of the finite dimensional simple Lie algbera tensored with Laurent Polynomials in several commuteing variables. In this paper we classify irreducible integrable modules for Toroidal Lie…

Representation Theory · Mathematics 2007-05-23 S. Eswara Rao

The aim of this work is to study the representation dimension of cluster tilted algebras. We prove that the weak representation dimension of tame cluster tilted algebras is equal to three. We construct a generator module that reaches the…

Representation Theory · Mathematics 2017-05-19 Alfredo González Chaio , Sonia Trepode

We show that the endomorphism ring of each cluster tilting object in a tubular cluster category is a finite dimensional Jacobian algebra which is tame of polynomial growth. Moreover, these Jacobian algebras are given by a quiver with a…

Rings and Algebras · Mathematics 2016-01-07 Christof Geiss , Raúl González-Silva

We give a characterization of $n$-cluster tilting subcategories of representation-directed algebras based on the $n$-Auslander-Reiten translations. As an application we classify acyclic Nakayama algebras with homogeneous relations which…

Representation Theory · Mathematics 2021-05-13 Laertis Vaso

We give a new characterization of tilted algebras by the existence of certain special subquivers in their Auslander-Reiten quiver. This result includes the existent characterizations of this kind and yields a way to obtain more tilted…

Representation Theory · Mathematics 2014-09-09 Shiping Liu