English

Extending ($\tau$-)tilting subcategories and (co)silting modules

Representation Theory 2022-08-29 v1 Category Theory Rings and Algebras

Abstract

Let BB be a finite dimensional algebra and A=B[P0]A=B[P_0] be the one-point extension algebra of BB with respect to the finitely generated projective BB-module P0P_0. The categories of BB-modules and AA-modules are related by two adjoint functors R\mathcal{R} and E\mathcal{E}, called the restriction and the extension functors, respectively. Based on the nice homological properties of these two functors, restriction and extension of some notions such as tilting and τ\tau-tilting modules have been studied in the category of finitely presented modules, i.e. small mod. In this paper, we investigate the behaviour of tilting and support τ\tau-tilting subcategories with respect to these two functors. Moreover, we investigate the restriction and the extension of special related modules such as finendo quasi-tilting modules, silting modules, and cosilting modules. Our studies will be done in the category of all modules, which will be called large Mod. Based on such study, in addition to the new results, classical results are extended, not only from modules to subcategories but also from small mod to large Mod.

Keywords

Cite

@article{arxiv.2208.12703,
  title  = {Extending ($\tau$-)tilting subcategories and (co)silting modules},
  author = {J. Asadollahi and F. Padashnik and S. Sadeghi and H. Treffinger},
  journal= {arXiv preprint arXiv:2208.12703},
  year   = {2022}
}

Comments

20 pages, Comments are welcome

R2 v1 2026-06-25T02:00:32.870Z