English

Silting theory under change of rings

Representation Theory 2022-04-04 v1

Abstract

The main goal of this paper is to compare the silting theory of an RR-algebra Λ\Lambda over a Noetherian ring RR with that of its tensor product ΛΓ\Lambda \otimes \Gamma with another RR-algebra Γ\Gamma. In the case that the RR-algebra Λ\Lambda is Noetherian, RR a complete local ring and a\mathfrak{a} a certain ideal of the ring RR, we obtain an isomorphism between the silting poset of Λ\Lambda and that of its quotient ΛR/a\Lambda \otimes R/ \mathfrak{a}. Furthermore, we study the restrictions of such a bijection to tilting complexes and deduce silting embedding and descent results for the algebra Λ\Lambda and a certain family of algebras (ΛΓi)iI(\Lambda \otimes \Gamma_i)_{i \in I}.

Keywords

Cite

@article{arxiv.2204.00608,
  title  = {Silting theory under change of rings},
  author = {Wassilij Gnedin},
  journal= {arXiv preprint arXiv:2204.00608},
  year   = {2022}
}