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This is the final one in the series of papers where we introduce and study the $C^*$-algebras associated with topological graphs. In this paper, we get a sufficient condition on topological graphs so that the associated $C^*$-algebras are…

Operator Algebras · Mathematics 2007-05-23 Takeshi Katsura

Let $\Delta$ be a building of type $\widetilde A_2$ and order $q$, with maximal boundary $\Omega$. Let $\Gamma$ be a group of type preserving automorphisms of $\Delta$ which acts regularly on the chambers of $\Delta$. Then the crossed…

Operator Algebras · Mathematics 2014-07-29 Guyan Robertson

We provide a complete classification of three-dimensional associative algebras over the real and complex number fields based on a complete elementary proof. We list up all the multiplication tables of the algebras up to isomorphism. We…

Rings and Algebras · Mathematics 2019-03-06 Yuji Kobayashi , Kiyoshi Shirayanagi , Sin-Ei Takahasi , Makoto Tsukada

We introduce a new class of algebras, which we call cluster-tilted. They are by definition the endomorphism algebras of tilting objects in a cluster category. We show that their representation theory is very close to the representation…

Representation Theory · Mathematics 2020-12-21 Aslak Bakke Buan , Bethany Marsh , Idun Reiten

Given a newform f, we extend Howard's results on the variation of Heegner points in the Hida family of f to a general quaternionic setting. More precisely, we build big Heegner points and big Heegner classes in terms of compatible families…

Number Theory · Mathematics 2010-10-19 M. Longo , S. Vigni

We consider $\G$-graded commutative algebras, where $\G$ is an abelian group. Starting from a remarkable example of the classical algebra of quaternions and, more generally, an arbitrary Clifford algebra, we develop a general viewpoint on…

Mathematical Physics · Physics 2009-12-08 Sophie Morier-Genoud , Valentin Ovsienko

A new (in)finite dimensional algebra which is a fundamental dynamical symmetry of a large class of (continuum or lattice) quantum integrable models is introduced and studied in details. Finite dimensional representations are constructed and…

Mathematical Physics · Physics 2014-11-18 P. Baseilhac , K. Koizumi

We present a novel approach to the construction of new finite algebras and describe the congruence lattices of these algebras. Given a finite algebra $(B_0, \dots)$, let $B_1, B_2, \dots, B_K$ be sets that either intersect $B_0$ or…

Rings and Algebras · Mathematics 2013-10-10 William DeMeo

A convex geometric hypergraph or cgh consists of a family of subsets of a strictly convex set of points in the plane. There are eight pairwise nonisomorphic cgh's consisting of two disjoint triples. These were studied at length by Bra{\ss}…

Combinatorics · Mathematics 2020-12-22 Zoltán Füredi , Dhruv Mubayi , Jason O'Neill , Jacques Verstraëte

Recently, Nakaoka and Palu introduced a notion of extriangulated categories. This is a unification of exact categories and triangulated categories. In this paper, we generalize the definitions of Hall algebras of exact categories and…

Representation Theory · Mathematics 2021-08-04 Li Wang , Jiaqun Wei , Haicheng Zhang

We observe that over an algebraically closed field, any finite-dimensional algebra is the endomorphism algebra of an m-cluster-tilting object in a triangulated m-Calabi-Yau category, where m is any integer greater than 2.

Rings and Algebras · Mathematics 2024-12-10 Sefi Ladkani

Reductive W-algebras which are generated by bosonic fields of spin-1, a single spin-2 field and fermionic fields of spin-3/2 are classified. Three new cases are found: a `symplectic' family of superconformal algebras which are extended by…

High Energy Physics - Theory · Physics 2009-10-22 P. Bowcock

We consider $m$-cluster tilted algebras arising from quivers of Euclidean type and we give necessary and sufficient conditions for those algebras to be representation finite. For the case $\widetilde{A}$, using the geometric realization, we…

Representation Theory · Mathematics 2018-10-22 Elsa Fernández , Ana Garcia Elsener , Sonia Trepode

We construct large classes of maximal commutative subalgebras in prime Steinberg algebras, generalizing a known result for Leavitt path algebras.

Rings and Algebras · Mathematics 2025-08-07 Anna Cichocka , Zachary Mesyan , Michal Ziembowski

In this paper the description of solvable Lie algebras with triangular nilradicals is extended to Leibniz algebras. It is proven that the matrices of the left and right operators on elements of Leibniz algebra have upper triangular forms.…

Rings and Algebras · Mathematics 2014-07-31 I. A. Karimjanov , A. Kh. Khudoyberdiyev , B. A. Omirov

Motivated by a new conjecture on the behavior of bricks, we start a systematic study of minimal $\tau$-tilting infinite algebras. In particular, we treat minimal $\tau$-tilting infinite algebras as a modern counterpart of minimal…

Representation Theory · Mathematics 2021-04-30 Kaveh Mousavand , Charles Paquette

We study a class of algebras that can be used as recognisers for regular languages of infinite trees.

Formal Languages and Automata Theory · Computer Science 2018-07-13 Achim Blumensath

This article aims to reinforce the broad applicability of the umbral approach to address complex mathematical challenges and contribute to various scientific and engineering endeavors. The umbral methods are used to reformulate the…

Classical Analysis and ODEs · Mathematics 2025-07-08 Subuhi Khan , Ujair Ahmad , Mehnaz Haneef , Serkan Araci

Notions of quasi-classical Lie-super algebra as well as Lie-super triple systems have been given and studied with some examples. Its application to Yang-Baxter equation has also been given.

q-alg · Mathematics 2008-02-03 Susumu Okubo , Noriaki Kamiya

In this work, the partially and totally hom-coassociative ternary coalgebras are constructed and discussed. Their {infinitesimal} bialgebraic structures are also investigated. The related dual space structures and their properties are…

Rings and Algebras · Mathematics 2018-05-23 Mahouton Norbert Hounkonnou , Gbevewou Damien Houndedji