English

The twisted inverse image pseudofunctor over commutative DG rings and perfect base change

Commutative Algebra 2017-09-22 v2 Algebraic Geometry

Abstract

Let KK be a Gorenstein noetherian ring of finite Krull dimension, and consider the category of cohomologically noetherian commutative differential graded rings AA over KK, such that H0(A)H^0(A) is essentially of finite type over KK, and AA has finite flat dimension over KK. We extend Grothendieck's twisted inverse image pseudofunctor to this category by generalizing the theory of rigid dualizing complexes to this setup. We prove functoriality results with respect to cohomologically finite and cohomologically essentially smooth maps, and prove a perfect base change result for f!f^{!} in this setting. As application, we deduce a perfect derived base change result for the twisted inverse image of a map between ordinary commutative noetherian rings. Our results generalize and solve some recent conjectures of Yekutieli.

Keywords

Cite

@article{arxiv.1510.05583,
  title  = {The twisted inverse image pseudofunctor over commutative DG rings and perfect base change},
  author = {Liran Shaul},
  journal= {arXiv preprint arXiv:1510.05583},
  year   = {2017}
}

Comments

38 pages. Final version, to appear in Advances in Mathematics