PreprintarXiv licencearXiv
Iwasawa cohomology of pseudorigid families of (φ,Γ)-modules
Abstract
We study the Iwasawa cohomology complex attached to a pseudorigid family of $(φ, Γ)$-modules and prove coadmissibility of its cohomology groups, perfectness and compatibility with base change. We apply this result to give another proof of perfectness of the Herr complex in pseudorigid family. We also use it to prove perfectness of Selmer complexes and obtain a result on variation of ranks of Selmer groups in analytic family.
Related
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BibTeX
@misc{jain2026iwasawa,
title = {{Iwasawa cohomology of pseudorigid families of $(φ,Γ)$-modules}},
author = {Yashi Jain},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.15845},
eprint = {2610.15845},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.15845},
}
RIS
TY - UNPB
TI - Iwasawa cohomology of pseudorigid families of (φ,Γ)-modules
AU - Yashi Jain
PY - 2026
DA - 2026/10/11
PB - arXiv
DO - 10.48550/arxiv.2610.15845
UR - https://arxiv.org/abs/2610.15845
AB - We study the Iwasawa cohomology complex attached to a pseudorigid family of $(φ, Γ)$-modules and prove coadmissibility of its cohomology groups, perfectness and compatibility with base change. We apply this result to give another proof of perfectness of the Herr complex in pseudorigid family. We also use it to prove perfectness of Selmer complexes and obtain a result on variation of ranks of Selmer groups in analytic family.
ER -