Quasitilted algebras have preprojective components

Ole Enge

Displaying similar documents to “Quasitilted algebras have preprojective components”

Minimal bipartite algebras of infinite prinjective type with prin-preprojective component

Stanisław Kasjan (1998)

Colloquium Mathematicae

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Slice modules over minimal 2-fundamental algebras

Zygmunt Pogorzały, Karolina Szmyt (2007)

Open Mathematics

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We consider a class of algebras whose Auslander-Reiten quivers have starting components that are not generalized standard. For these components we introduce a generalization of a slice and show that only in finitely many cases (up to isomorphism) a slice module is a tilting module.

On large selforthogonal modules

Gabriella D'Este (2006)

Commentationes Mathematicae Universitatis Carolinae

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We construct non faithful direct summands of tilting (resp. cotilting) modules large enough to inherit a functorial tilting (resp. cotilting) behaviour.

A note on tilting sequences

Clezio Braga, Flávio Coelho (2008)

Open Mathematics

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We discuss the existence of tilting modules which are direct limits of finitely generated tilting modules over tilted algebras.

Iterated coil enlargements of algebras

Bertha Tomé (1995)

Fundamenta Mathematicae

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Let Λ be a finite-dimensional, basic and connected algebra over an algebraically closed field, and mod Λ be the category of finitely generated right Λ-modules. We say that Λ has acceptable projectives if the indecomposable projective Λ-modules lie either in a preprojective component without injective modules or in a standard coil, and the standard coils containing projectives are ordered. We prove that for such an algebra Λ the following conditions are equivalent: (a) Λ is tame, (b)...

Full embeddings of almost split sequences over split-by-nilpotent extensions

Ibrahim Assem, Dan Zacharia (1999)

Colloquium Mathematicae

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Let R be a split extension of an artin algebra A by a nilpotent bimodule $_{A} Q_{A}$ , and let M be an indecomposable non-projective A-module. We show that the almost split sequences ending with M in mod A and mod R coincide if and only if $H o m_{A} (Q, τ_{A} M)$ = 0 and $M \otimes_{A} Q = 0$ .

Embeddings of Kronecker modules into the category of prinjective modules and the endomorphism ring problem

Rüdiger Göbel, Daniel Simson (1998)

Colloquium Mathematicae

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One point extensions of trees and quadratic forms

Nikolaos Marmaridis (1990)

Fundamenta Mathematicae

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