A refinement of the motivic volume, and specialization of birational types
Algebraic Geometry
2021-07-09 v3
Abstract
We construct an upgrade of the motivic volume by keeping track of dimensions in the Grothendieck ring of varieties. This produces a uniform refinement of the motivic volume and its birational version introduced by Kontsevich and Tschinkel to prove the specialization of birational types. We also provide several explicit examples of obstructions to stable rationality arising from this technique.
Keywords
Cite
@article{arxiv.2004.08161,
title = {A refinement of the motivic volume, and specialization of birational types},
author = {Johannes Nicaise and John Christian Ottem},
journal= {arXiv preprint arXiv:2004.08161},
year = {2021}
}
Comments
Final version, to appear in "Rationality of varieties", volume 342 of Progress in Mathematics, Birkh\"auser