English

Classical derived functors as fully faithful embeddings

Representation Theory 2014-03-20 v1

Abstract

Given associative unital algebras AA and BB and a complex TT^\bullet of BAB-A-bi\-modules, we give necessary and sufficient conditions for the total derived functors, \RhA(T,?):\D(A)\D(B)\Rh_A(T^\bullet,?):\D(A)\longrightarrow\D(B) and ?\LtBT:\D(B)\D(A)?\Lt_BT^\bullet:\D(B)\longrightarrow\D(A), to be fully faithful. We also give criteria for these functors to be one of the fully faithful functors appearing in a recollement of derived categories. In the case when TT^\bullet is just a BAB-A-bimodule, we connect the results with (infinite dimensional) tilting theory and show that some open question on the fully faithfulness of \RhA(T,?)\Rh_A(T,?) is related to the classical Wakamatsu tilting problem.

Keywords

Cite

@article{arxiv.1403.4726,
  title  = {Classical derived functors as fully faithful embeddings},
  author = {Pedro Nicolas and Manuel Saorin},
  journal= {arXiv preprint arXiv:1403.4726},
  year   = {2014}
}
R2 v1 2026-06-22T03:29:44.239Z