Derived equivalences via Tate resolutions
Abstract
For any finite sequence of elements in a commutative noetherian ring , we show that for , the natural map from the Koszul complex to the Koszul complex factors through the Tate resolution on . Using this, for any resolving subcategory of mod() and any ideal such that it has a filtration which is equivalent to the -adic filtration and , we show a derived equivalence between the bounded derived category of finitely generated modules supported on having finite -dimension and the bounded derived category of with homologies supported on . As a special case, when is of prime characteristic and is of finite projective dimension, we obtain a derived equivalence between the bounded derived category of finite projective dimension modules supported on and the bounded derived category of projective modules with homologies supported on .
Cite
@article{arxiv.2601.12531,
title = {Derived equivalences via Tate resolutions},
author = {K. Ganapathy and Sarang Sane},
journal= {arXiv preprint arXiv:2601.12531},
year = {2026}
}
Comments
23 pages; appeared in Journal of Algebra