On Certain Admissible Embeddings of L-groups

Details On Certain Admissible Embeddings of L-groups On Certain Admissible Embeddings of L-groups

2011-09-21

arxiv.org/abs/1109.4529v1

Mathematics

Representation Theory

11 pages

Scientific paper

Let $F$ be a local field and $E/F$ be a separable extension of degree $n$. Regard $T=\text{Res}_{E/F} \mathbb{G}_m$ as an elliptic maximal torus of $G=\mathrm{GL}_n$. We can construct an admissible embedding of L-groups ${}^LT\hookrightarrow {}^LG$ using Langlands-Shelstad $\chi$-data. Such embedding gives rise to an induced representation of the Weil group $W_F$ of $F$ from a character of $W_E$. The relation between induced representations and admissible embeddings provides a different interpretation of the work of Bushnell-Henniart on the essentially tame local Langlands correspondence.

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