Galois Cohomology for Lubin-Tate $(\varphi_q,\Gamma_{LT})$-modules over Coefficient rings
Abstract
The classification of the local Galois representations using -modules by Fontaine has been generalized by Kisin and Ren over the Lubin-Tate extensions of local fields using the theory of -modules. In this paper, we extend the work of (Fontaine) Herr by introducing a complex which allows us to compute cohomology over the Lubin-Tate extensions and compare it with the Galois cohomology groups. We further extend that complex to include certain non-abelian extensions. We then deduce some relations of this cohomology with those arising from -modules. We also compute the Iwasawa cohomology over the Lubin-Tate extensions in terms of -operator acting on the \'{e}tale -module attached to the local Galois representation. Moreover, we generalize the notion of -modules over the coefficient ring and show that the equivalence given by Kisin and Ren extends to the Galois representations over . This equivalence allows us to generalize our results to the case of coefficient rings.
Keywords
Cite
@article{arxiv.1908.03941,
title = {Galois Cohomology for Lubin-Tate $(\varphi_q,\Gamma_{LT})$-modules over Coefficient rings},
author = {Chandrakant Aribam and Neha Kwatra},
journal= {arXiv preprint arXiv:1908.03941},
year = {2022}
}
Comments
Accepted in Research in Number Theory