The Ekedahl Invariants for finite groups
Algebraic Geometry
2015-08-17 v5 Group Theory
K-Theory and Homology
Abstract
In 2009 Ekedahl introduced certain cohomological invariants of finite groups which are naturally related to the Noether Problem. We show that these invariants are trivial for every finite group in GL_3(k) and for the fifth discrete Heisenberg group H_5. Moreover in the case of finite linear groups with abelian projective reduction, these invariants satisfy a recurrence relation in a certain Grothendieck group for abelian groups.
Keywords
Cite
@article{arxiv.1312.0476,
title = {The Ekedahl Invariants for finite groups},
author = {Ivan Martino},
journal= {arXiv preprint arXiv:1312.0476},
year = {2015}
}
Comments
to appear in Journal of Pure and Applied Algebra; 20 pages, one figure, two tables