Indecomposables as elements in affine composition algebras

[摘要] Let A be a path algebra of tame type over a finite field, let M be an indecomposable A-module, and let C(A) be the composition algebra of A. The main result in this paper is that [M] is an element of C(A) if and only if M is a stone, i.e., Ext(A)(1)(M, M) = 0. (C) 1998 Academic Press.

[发布日期] 1998-12-15