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Let $E$ be an arbitrary graph and $K$ be any field. We construct various classes of non-isomorphic simple modules over the Leavitt path algebra $L_{K}(E)$ induced by vertices which are infinite emiters, closed paths which are exclusive…

Rings and Algebras · Mathematics 2013-11-19 Pere Ara , Kulumani M. Rangaswamy

Using the E-algebraic systems, various graded irreducible representations of a Leavitt path algebra L of a graph E over a field K are constructed. The concept of a Laurent vertex is introduced and it is shown that the minimal graded left…

Rings and Algebras · Mathematics 2015-07-23 Roozbeh Hazrat , Kulumani M. Rangaswamy

In this article, we provide an explicit description of a set of generators for any ideal of an ultragraph Leavitt path algebra. We provide several additional consequences of this description, including information about generating sets for…

Rings and Algebras · Mathematics 2021-09-23 T. T. H. Duyen , D. ~Gonçalves , T. G. Nam

Irreducible representations of both Leavitt and Cohn path algebras of an arbitrary digraph with coefficients in a commutative field is classified. They are constructed in several ways using both infinite paths on the right as well as direct…

Rings and Algebras · Mathematics 2019-03-25 P. N. Anh , T. G. Nam

We completely characterize perfect, permutative, irreducible representations of an ultragraph Leavitt path algebra. For this we extend to ultragraph Leavitt path algebras Chen's construction of irreducible representations of Leavitt path…

Rings and Algebras · Mathematics 2019-06-28 Daniel Gonçalves , Danilo Royer

Given an arbitrary graph E and any field K, a new class of simple left modules over the Leavitt path algebra L of the graph E over K is constructed by using vertices that emit infinitely many edges. The corresponding annihilating primitive…

Rings and Algebras · Mathematics 2014-01-28 Kulumani M. Rangaswamy

In this paper we study the graded version of Naimark's problem for Leavitt path algebras considering them as $\mathbb{Z}$-graded algebras. Several characterizations are obtained of a Leavitt path algebra $L$ of an arbitrary graph $E$ over a…

Rings and Algebras · Mathematics 2025-06-11 Kulumani M. Rangaswamy , Ashish K Srivastava

Let E be an arbitrary directed graph with no restrictions on the number of vertices and edges and let K be any field. We give necessary and sufficient conditions for the Leavitt path algebra L_K(E) to be of countable irreducible…

Rings and Algebras · Mathematics 2014-06-26 Pere Ara , Kulumani M. Rangaswamy

We study representations of a Leavitt path algebra $L$ of a finitely separated digraph $\Gamma$ over a field. We show that the category of $L$-modules is equivalent to a full subcategory of quiver representations. When $\Gamma$ is a…

Rings and Algebras · Mathematics 2019-06-03 Ayten Koç , Murad Özaydın

In this paper, we classify all Leavitt path algebras which have the property that every Lie ideal is an ideal. As an application, we show that Leavitt path algebras with this property provide a class of locally finite, infinite-dimensional…

Rings and Algebras · Mathematics 2025-08-25 Huynh Viêt Khánh

The irreducible components of varieties parametrizing the finite dimensional representations of a finite dimensional algebra $\Lambda$ are explored, with regard to both their geometry and the structure of the modules they encode. Provided…

Representation Theory · Mathematics 2014-07-11 E. Babson , B. Huisgen-Zimmermann , R. Thomas

In this paper, we give a complete characterization of Leavitt path algebras which are graded $\Sigma $-$V$ rings, that is, rings over which a direct sum of arbitrary copies of any graded simple module is graded injective. Specifically, we…

Rings and Algebras · Mathematics 2017-10-19 Roozbeh Hazrat , Kulumani M. Rangaswamy , Ashish K. Srivastava

We construct some irreducible representations of the Leavitt path algebra of an arbitrary quiver. The constructed representations are associated to certain algebraic branching systems. For a row-finite quiver, we classify algebraic…

Representation Theory · Mathematics 2015-02-10 Xiao-Wu Chen

We show that every graded ideal of a Leavitt path algebra is graded isomorphic to a Leavitt path algebra. It is known that a graded ideal $I$ of a Leavitt path algebra is isomorphic to the Leavitt path algebra of a graph, known as the…

Rings and Algebras · Mathematics 2022-11-23 Lia Vas

We study the category of left unital graded modules over the Steinberg algebra of a graded ample Hausdorff groupoid. In the first part of the paper, we show that this category is isomorphic to the category of unital left modules over the…

K-Theory and Homology · Mathematics 2018-04-04 Pere Ara , Roozbeh Hazrat , Huanhuan Li , Aidan Sims

Leavitt path algebras of bi-separated graphs have been recently introduced by R. Mohan and B. Suhas. These algebras provide a common framework for studying various generalisations of Leavitt path algebras. In this paper we obtain modules…

Rings and Algebras · Mathematics 2023-07-21 Raimund Preusser

We show that the graph construction used to prove that a gauge-invariant ideal of a graph C*-algebra is isomorphic to a graph C*-algebra, and also used to prove that a graded ideal of a Leavitt path algebra is isomorphic to a Leavitt path…

Operator Algebras · Mathematics 2013-04-16 Efren Ruiz , Mark Tomforde

There is an extensive recent literature on the graded, non-graded, prime, primitive, maximal ideals of Leavitt path algebras. In this introductory level survey, we will be giving an overview of different types of ideals and the…

Rings and Algebras · Mathematics 2020-12-29 Muge Kanuni , Suat Sert

We obtain a complete structural characterization of Cohn-Leavitt algebras over no-exit objects as graded involutive algebras. Corollaries of this result include graph-theoretic conditions characterizing when a Leavitt path algebra is a…

Rings and Algebras · Mathematics 2020-04-08 Lia Vas

In this work we describe all simple modules over Leavitt path algebras as induced modules from irreducible representations of the isotropy groups.

Rings and Algebras · Mathematics 2020-01-17 Nguyen Bich Van
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