Distinction of some induced representations
Résumé
Let $K/F$ be a quadratic extension of $p$-adic fields, $\sigma$ the nontrivial element of the Galois group of $K$ over $F$, and $\pi$ a quasi-square-integrable representation of $GL(n,K)$. Denoting by $\pi^{\vee}$ the smooth contragredient of $\pi$, and by $\pi^{\sigma}$ the representation $\pi\circ \sigma$, we show that the representation of $GL(2n, K)$ obtained by normalized parabolic induction of the representation $\pi^\vee \otimes \pi^\sigma$ is distinguished with respect to $GL(2n,F)$. This is a step towards the classification of distinguished generic representations of general linear groups over $p$-adic fields.
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