English

Relative contravariantly finite subcategories and relative tilting modules

Representation Theory 2016-12-28 v1

Abstract

Let AA be a finite dimensional algebra over an algebraically closed field kk. Let TT be a tilting AA-module and B=EndA TB={\rm End}_A\ T be the endomorphism algebra of TT. In this paper, we consider the correspondence between the tilting AA-modules and the tilting BB-modules, and we prove that there is a one-one correspondence between the basic TT-tilting AA-modules in TT^{\perp} and the basic tilting BB-modules in (DBT)^{\perp}(D_BT). Moreover, we show that there is a one-one correspondence between the TT-contravariantly finite TT-resolving subcategories of TT^{\perp} and the basic TT-tilting AA-modules contained in TT^{\perp}. As an application, we show that there is a one-one correspondence between the basic tilting AA-modules in TT^{\perp} and the basic tilting BB-modules in (DBT)^{\perp}(D_BT) if AA is a 11-Gorenstein algebra or a mm-replicated algebra over a finite dimensional hereditary algebra.

Keywords

Cite

@article{arxiv.1612.08342,
  title  = {Relative contravariantly finite subcategories and relative tilting modules},
  author = {Wei Han and Shen Li and Shunhua Zhang},
  journal= {arXiv preprint arXiv:1612.08342},
  year   = {2016}
}

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21 pages