Derived equivalences via Tate resolutions

preprint2026arXivOpen access

Abstract

For any finite sequence of elements s1,…,sds_1, \ldots , s_d in a commutative noetherian ring RR, we show that for n≫0n \gg 0, the natural map from the Koszul complex K(s1n,…,sdn)K(s_1^n, \ldots , s_d^n) to the Koszul complex K(s1,…,sd)K(s_1, \ldots , s_d) factors through the Tate resolution on s1n,…,sdns_1^n, \ldots , s_d^n. Using this, for any resolving subcategory A\mathcal A of mod(RR) and any ideal II such that it has a filtration {In}\{ I_n \} which is equivalent to the II-adic filtration and dimA(R/In)<∞\textrm{dim}_{\mathcal A}(R/I_n) < \infty, we show a derived equivalence between the bounded derived category of finitely generated modules supported on V(I)V(I) having finite A\mathcal A-dimension and the bounded derived category of A\mathcal A with homologies supported on V(I)V(I). As a special case, when RR is of prime characteristic and II is of finite projective dimension, we obtain a derived equivalence between the bounded derived category of finite projective dimension modules supported on V(I)V(I) and the bounded derived category of projective modules with homologies supported on V(I)V(I).

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