English

Universal localizations of $d$-homological pairs

Representation Theory 2022-05-10 v1

Abstract

Let kk be an algebraically closed field and Φ\Phi a finite dimensional kk-algebra. The universal localization ΦΦS\Phi\rightarrow \Phi_\mathcal{S} of Φ\Phi with respect to a set of morphisms between finitely generated projective Φ\Phi-modules S\mathcal{S} always exists. Moreover, when Φ\Phi is hereditary, Krause and \v{S}\v{t}ov\'i\v{c}ek proved that the universal localizations of Φ\Phi are in bijective correspondence with various natural structures. Taking inspiration from an alternative definition of universal localizations involving a triangulated subcategory of Dperf(Φ)\mathcal{D}^{\text{perf}}(\Phi), we introduce a higher analogue of universal localizations. That is, fixing a positive integer dd, we define universal localizations of dd-homological pairs (Φ,F)(\Phi,\mathcal{F}) with respect to suitable wide subcategories U\mathcal{U} of Db(modΦ)\mathcal{D}^b(\text{mod}\Phi). When gldimΦd\Phi\leq d, we show that the result by Krause and \v{S}\v{t}ov\'i\v{c}ek has a (partial) higher analogue and that such universal localizations exist with respect to any choice of U\mathcal{U} with the required properties. Moreover, we show that in this setup, the base case of our definition and the definition of classic universal localization coincide.

Keywords

Cite

@article{arxiv.2205.04219,
  title  = {Universal localizations of $d$-homological pairs},
  author = {Francesca Fedele},
  journal= {arXiv preprint arXiv:2205.04219},
  year   = {2022}
}

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25 pages