English

On $g$-finiteness in the category of projective presentations

Representation Theory 2024-06-21 v2

Abstract

We provide new equivalent conditions for an algebra Λ\Lambda to be gg-finite, analogous to those established by L. Demonet, O. Iyama, and G. Jasso, but within the category of projective presentations K[1,0](projΛ)\mathcal{K}^{[-1,0]}(\text{proj} \Lambda). We show that an algebra has finitely many isomorphism classes of basic 22-term silting objects if and only if all cotorsion pairs in K[1,0](projΛ)\mathcal{K}^{[-1,0]}(\text{proj} \Lambda) are complete. Furthermore, we establish that this criterion is also equivalent to all thick subcategories in K[1,0](projΛ)\mathcal{K}^{[-1,0]}(\text{proj} \Lambda) having enough injective and projective objects.

Keywords

Cite

@article{arxiv.2406.04134,
  title  = {On $g$-finiteness in the category of projective presentations},
  author = {Monica Garcia},
  journal= {arXiv preprint arXiv:2406.04134},
  year   = {2024}
}

Comments

27 pages, 1 figure. V2 : Added Proposition 2.13