The twisted inverse image pseudofunctor over commutative DG rings and perfect base change
Abstract
Let be a Gorenstein noetherian ring of finite Krull dimension, and consider the category of cohomologically noetherian commutative differential graded rings over , such that is essentially of finite type over , and has finite flat dimension over . 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 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