Truncated path algebras and Betti numbers of polynomial growth

Ryan Coopergard, Marju Purin

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate a class of truncated path algebras in which the Betti numbers of a simple module satisfy a polynomial of arbitrarily large degree. We produce truncated path algebras where the i-th Betti number of a simple module S is βi(S) = ik for 2 ≤ k ≤ 4 and provide a result of the existence of algebras where βi(S) is a polynomial of degree 4 or less with nonnegative integer coefficients. In particular, we prove that this class of truncated path algebras produces Betti numbers corresponding to any polynomial in a certain family.

Original languageEnglish (US)
Pages (from-to)919-940
Number of pages22
JournalInvolve
Volume12
Issue number6
DOIs
StatePublished - 2019

Bibliographical note

Publisher Copyright:
© 2019, Mathematical Sciences Publishers. All rights reserved.

Keywords

  • Betti number
  • finite-dimensional algebra
  • path algebra
  • quiver

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