Relative group (co)homology theories with coefficients and the comparison homomorphism
Abstract
Let be a group, let be a subgroup of and let be the orbit category. In this paper we extend the definition of the relative group (co)homology theories of the pair defined by Adamson and Takasu to have coefficients in an -module. There is a canonical comparison homomorphism defined by Cisneros-Molina and Arciniega-Nev\'arez from Takasu's theory to Adamson's one. We give a necessary and sufficient condition on the subgroup for which the comparison homomorphism is an isomorphism for all coefficients. We also use the L\"uck-Wiermann construction to introduce a long exact sequence for Adamson (co)homology. Finally, we provide some examples of explicit computations for the comparison homomorphism.
Keywords
Cite
@article{arxiv.1809.01209,
title = {Relative group (co)homology theories with coefficients and the comparison homomorphism},
author = {José Antonio Arciniega-Nevárez and José Luis Cisneros-Molina and Luis Jorge Sánchez Saldaña},
journal= {arXiv preprint arXiv:1809.01209},
year = {2020}
}
Comments
Shortened version. This version was accepted for publication in Quaestiones Mathematicae