On flat pullbacks for Chow groups
Algebraic Geometry
2022-01-25 v2
Abstract
It is a fundamental property of the Chow groups of algebraic schemes that they are contra-functorial with respect to flat morphisms between schemes. While the pullback homomorphism is easy to define at the level of algebraic cycles, the crucial step is to show that the pullback of cycles preserves rational equivalence, so that it descends to the Chow groups. The purpose of this note is to give a natural sheaf theoretic proof of the preservation of rational equivalence under flat pullback on cycles.
Cite
@article{arxiv.2201.04101,
title = {On flat pullbacks for Chow groups},
author = {Nitin Nitsure},
journal= {arXiv preprint arXiv:2201.04101},
year = {2022}
}
Comments
Reason for re-submission: The Introduction and the end remarks are modified, a reference is added. 9 pages