English

Finite-dimensional algebras with smallest resolutions of simple modules

Representation Theory 2007-05-23 v2 Rings and Algebras

Abstract

Let XX be a finitely generated left module over a left artinian ring RR, and let p(X)={li}p(X)=\{l_i\} be the infinite sequence of nonnegative integers where lil_i is the length of the ii-th term of the minimal projective resolution of XX. We introduce a preorder relation \le on the set {p(X)}\{p(X)\} and characterize the elementary finite-dimensional algebras Λ\Lambda with the following property. Let SS be a simple Λ\Lambda-module, and let TT be a finitely generated module over an arbitrary left artinian ring RR. If the projective dimension of SS does not exceed the projective dimension of TT, then p(S)p(T)p(S)\le p(T). We characterize the indicated algebras by quivers with relations.

Keywords

Cite

@article{arxiv.math/0512656,
  title  = {Finite-dimensional algebras with smallest resolutions of simple modules},
  author = {Shashidhar Jagadeeshan and Mark Kleiner},
  journal= {arXiv preprint arXiv:math/0512656},
  year   = {2007}
}

Comments

Minor revisions, to appear in Journal of Algebra

R2 v1 2026-07-22T17:29:18.470Z