Projectively stable artin algebras: Representation theory and quivers with relations

Shashidhar Jagadeeshan, Mark Kleiner

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A left artinian ring A is projectively stable if no non-zero morphism f : M → N of finitely generated left A-modules M, N having no non-zero projective direct summands factors through a projective module. Such rings have many good properties and, although the definition is given in terms of the category of modules, the structure of projectively stable left artinian rings allows a satisfying description: they are "built" from well-known left artinian rings, left hereditary and serial, by a pullback of rings construction. We show that representations of projectively stable artin algebras are also "built" from representations of well-studied artin algebras, hereditary and serial. Namely, we give a simple geometric construction that produces the Auslander-Reiten quiver or the ordinary quiver of a projectively stable algebra from those of an hereditary algebra and a serial algebra.

Original languageEnglish (US)
Pages (from-to)2277-2316
Number of pages40
JournalCommunications in Algebra
Issue number5
StatePublished - 1999

ASJC Scopus subject areas

  • Algebra and Number Theory


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