Représentations 𝑝-adiques et normes universelles I. Le cas cristallin

Perrin-Riou, Bernadette

doi:10.1090/S0894-0347-00-00329-5

Représentations $p$-adiques et normes universelles I. Le cas cristallin
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by Bernadette Perrin-Riou;

J. Amer. Math. Soc. 13 (2000), 533-551

DOI: https://doi.org/10.1090/S0894-0347-00-00329-5

Published electronically: March 13, 2000

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Abstract:

Let $V$ be a crystalline $p$-adic representation of the absolute Galois group $G_K$ of an finite unramified extension $K$ of $\mathbb {Q}_p$, and let $T$ be a lattice of $V$ stable by $G_K$. We prove the following result: Let $\mathrm {Fil}^1V$ be the maximal sub-representation of $V$ with Hodge-Tate weights strictly positive and $\mathrm {Fil}^1T=T\cap \mathrm {Fil}^1V$. Then, the projective limit of $H^1_g(K(\mu _{p^n}), T)$ is equal up to torsion to the projective limit of $H^1(K(\mu _{p^n}), \mathrm {Fil} ^1T)$. So its rank over the Iwasawa algebra is $[K:\mathbb {Q}_p]\operatorname {dim}\mathrm {Fil}^1 V$.

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