English

The derived category with respect to a generator

K-Theory and Homology 2014-11-25 v2

Abstract

Consider a Grothendieck category G\mathcal{G} along with a choice of generator GG, or equivalently a generating set {Gi}\{G_i\}. We introduce the derived category D(G)\mathcal{D}(G), which kills all GG-acyclic complexes, by putting a suitable model structure on the category of chain complexes. It follows that the category D(G)\mathcal{D}(G) is always a well-generated triangulated category. It is compactly generated whenever the generating set {Gi}\{G_i\} has each GiG_i finitely presented, and in this case we show that two recollement situations hold. The first is when passing from the homotopy category K(G)K(\mathcal{G}) to D(G)\mathcal{D}(G). The second is a GG-derived analog to the recollement of Krause. We illustrate with several examples ranging from pure and clean derived categories to quasi-coherent sheaves on the projective line P1(k)P^1(k).

Keywords

Cite

@article{arxiv.1406.2514,
  title  = {The derived category with respect to a generator},
  author = {James Gillespie},
  journal= {arXiv preprint arXiv:1406.2514},
  year   = {2014}
}
R2 v1 2026-06-22T04:34:56.576Z