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Let $A$ be a finite dimensional hereditary algebra over a field $k$ and $A^{(1)}$ the duplicated algebra of $A$. We first show that the global dimension of endomorphism ring of tilting modules of $A^{(1)}$ is at most 3. Then we investigate…

Representation Theory · Mathematics 2011-05-17 Guopeng Wang , Shunhua Zhang

We study certain special tilting and cotilting modules for an algebra with positive dominant dimension, each of which is generated or cogenerated (and usually both) by projective-injectives. These modules have various interesting…

Representation Theory · Mathematics 2023-06-22 Matthew Pressland , Julia Sauter

This paper is devoted to study the relationship between two important notions in ring theory, category theory, and representation theory of Artin algebras; namely, Gabriel topologies and higher Auslander(-Gorenstein) algebras. It is…

Representation Theory · Mathematics 2025-04-08 Mohammad Hossein Keshavarz , Guodong Zhou

We study partially and totally associative ternary algebras of first and second kind. Assuming the vector space underlying a ternary algebra to be a topological space and a triple product to be continuous mapping we consider the trivial…

Rings and Algebras · Mathematics 2009-01-22 V. Abramov , R. Kerner , O. Liivapuu , S. Shitov

We show that for a given Nakayama algebra $\Theta$, there exist countably many cyclic Nakayama algebras $\Lambda_i$, where $i \in \mathbb{N}$, such that the syzygy filtered algebra of $\Lambda_i$ is isomorphic to $\Theta$ and we describe…

Representation Theory · Mathematics 2024-06-04 Emre Sen , Gordana Todorov , Shijie Zhu

Certain operator algebras A on a Hilbert space have the property that every densely defined linear transformation commuting with A is closable. Such algebras are said to have the closability property. They are important in the study of the…

Functional Analysis · Mathematics 2009-08-10 H. Bercovici , R. G. Douglas , C. Foias , C. Pearcy

This is an appendix to the Handbook of Tilting Theory, edited by Angeleri-Huegel, Happel and Krause, to be published soon. Part 1 of the appendix provides an outline of the core of tilting theory. Part 2 is devoted to topics where tilting…

Representation Theory · Mathematics 2007-05-23 Claus Michael Ringel

Let $\mathcal{M}$ be a small $n$-abelian category. We show that the category of finitely presented functors $mod$-$\mathcal{M}$ modulo the subcategory of effaceable functors $mod_0$-$\mathcal{M}$ has an $n$-cluster tilting subcategory which…

Representation Theory · Mathematics 2023-08-29 Ramin Ebrahimi , Alireza Nasr-Isfahani

We survey the development and status quo of a subject best described as "generic representation theory of finite dimensional algebras", which started taking shape in the early 1980s. Let $\Lambda$ be a finite dimensional algebra over an…

Representation Theory · Mathematics 2019-12-20 K. R. Goodearl , B. Huisgen-Zimmermann

We provide a unified approach, via deformations of incidence algebras, to several important types of representations with finiteness conditions, as well as the combinatorial algebras which produce them. We show that over finite dimensional…

Representation Theory · Mathematics 2018-05-07 Miodrag C. Iovanov , Gerard D. Koffi

We consider endomorphism algebras of $n$-term silting complexes in derived categories of hereditary algebras, and we show that the module category of such an endomorphism algebra has a separated $n$-section. For $n=3$ we obtain a trisection…

Representation Theory · Mathematics 2024-11-06 Lidia Angeleri Hügel , Marcelo Lanzilotta , Jifen Liu , Sonia Trepode

Recall that an algebraic module is a KG-module that satisfies a polynomial with integer coefficients, with addition and multiplication given by direct sum and tensor product. In this article we prove that if L is a component of the (stable)…

Representation Theory · Mathematics 2008-01-18 David A. Craven

We prove that the representation dimension of a selfinjective algebra of wild tilted type is equal to three, and give an explicit construction of an Auslander generator of its module category. We also show that if a connected selfinjective…

Representation Theory · Mathematics 2016-07-04 Ibrahim Assem , Andrzej Skowronski , Sonia Trepode

We prove that over an algebraically closed field there is a representation embedding from the category of classical Kronecker-modules without the simple injective into the category of finite-dimensional modules over any…

Representation Theory · Mathematics 2023-05-30 Klaus Bongartz

In arXiv:1104.4441 it was shown that any 1-quasi-hereditary algebra affords a particular basis which is related to a given partial order on the set of simple modules. We show that the modules generated by these basis-elements are also…

Representation Theory · Mathematics 2012-01-23 Daiva Pucinskaite

We determine the structure of all finite-dimensional self-injective algebras over a field whose Auslander-Reiten quiver admits a hereditary stable slice.

Representation Theory · Mathematics 2018-08-22 Andrzej Skowroński , Kunio Yamagata

Let $\Lambda$ be a finite-dimensional algebra over an algebraically closed field, then $\Lambda$ is either tame or wild. Is there any homological description in terms of AR-translations on tameness? Or equivalently, is there any…

Representation Theory · Mathematics 2007-05-23 Yingbo Zhang , Yunge Xu

We show that a properly stratified algebra is Gorenstein if and only if the characteristic tilting module coincides with the characteristic cotilting module. We further show that properly stratified Gorenstein algebras $A$ enjoy strong…

Representation Theory · Mathematics 2021-01-29 Tiago Cruz , René Marczinzik

For a given hereditary abelian category satisfying some finiteness conditions, in certain twisted cases it is shown that the modified Ringel-Hall algebra is isomorphic to the naive lattice algebra and there exists an epimorphism from the…

Representation Theory · Mathematics 2018-08-14 Ji Lin

We prove Auslander's defect formula in an exact category, and obtain a commutative triangle involving the Auslander bijections and the generalized Auslander-Reiten duality.

Representation Theory · Mathematics 2020-03-24 Pengjie Jiao