Galois cohomology of pp-adic fields and (φ,τ)(φ, τ)-modules

preprint2022arXivOpen access

Abstract

We construct various explicit Herr complexes that compute the Galois cohomology of a pp-adic representation of the absolute Galois group of a complete discrete valuation field of characteristic 00 with a perfect residue field of characteristic pp, using the associated (φ,τ)(φ,τ)-modules (defined by Xavier Caruso), instead of (φ,Γ)(φ,Γ)-modules. We also give an application to pp-divisible groups.

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