English

Derived equivalences for chain complexes with support

Category Theory 2026-02-17 v2 Commutative Algebra Algebraic Geometry

Abstract

For a Serre subcategory L\mathscr L and a resolving subcategory A\mathscr A of an abelian category, we show that the derived equivalence Db(AL)DLb(A)D^b(\overline{\mathscr A} \cap \mathscr L) \simeq D^b_{\mathscr L}(\mathscr A) holds under certain conditions. We apply this to obtain derived equivalences in the contexts of chain complexes of graded modules or coherent sheaves, with finite A\mathscr A-dimension, supported on closed sets having eventually finite A\mathscr A-dimension. Using this, we obtain descriptions of the homotopy fibers in (hermitian) K theory of the restriction maps to certain open sets.

Keywords

Cite

@article{arxiv.2601.16729,
  title  = {Derived equivalences for chain complexes with support},
  author = {Ganapathy Krishnamoorthy and Sarang Sane},
  journal= {arXiv preprint arXiv:2601.16729},
  year   = {2026}
}

Comments

27 pages. final section added

R2 v1 2026-07-01T09:17:21.265Z