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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2404.00396 |
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- Let $p$ be a prime number, $K$ a finite unramified extension of $\mathbb{Q}_p$ and $\mathbb{F}$ a finite extension of $\mathbb{F}_p$. For $\overlineρ$ any reducible two-dimensional representation of $\operatorname{Gal}(\overline{K}/K)$ over $\mathbb{F}$, we compute explicitly the associated étale $(φ,\mathcal{O}_K^{\times})$-module $D_A^{\otimes}(\overlineρ)$ defined by Breuil-Herzig-Hu-Morra-Schraen. Then we let $π$ be an admissible smooth representation of $\operatorname{GL}_2(K)$ over $\mathbb{F}$ occurring in some Hecke eigenspaces of the mod $p$ cohomology and $\overlineρ$ be its underlying two-dimensional representation of $\operatorname{Gal}(\overline{K}/K)$ over $\mathbb{F}$. Assuming that $\overlineρ$ is maximally non-split, we prove under some genericity assumption that the associated étale $(φ,\mathcal{O}_K^{\times})$-module $D_A(π)$ defined by Breuil-Herzig-Hu-Morra-Schraen is isomorphic to $D_A^{\otimes}(\overlineρ)$. This extends the results of Breuil-Herzig-Hu-Morra-Schraen, where $\overlineρ$ was assumed to be semisimple.