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arXiv 1402.4056math.NT
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关于扭外对称平方$γ$ -因子

On twisted exterior and symmetric square $γ$-factors

Radhika Ganapathy, Luis Lomelí

摘要:

通过研究广义旋量群的Siegel Levi情形,建立了正特征的扭外对称平方$γ$ -因子的存在唯一性.特征零点的相应理论是由Shahidi提出的。此外,在特征$p$中,我们证明了这些扭曲的局部因子与局部朗兰兹对应是相容的。因此,仍然在特征$p$,我们得到的稳定性证明$γ$ -因素下扭曲的高度分歧字符。接下来,我们使用的结果的相容性的Langlands-Shahidi局部系数与Deligne-Kazhdan理论在封闭的局部领域,以显示扭曲的对称和外部平方$γ$ -因素,$L$ -功能和$\varepsilon$ -因素保持在封闭的局部域。此外,我们得到了一个公式的Plancherel措施的地方因素,我们还表明,他们也保持了密切的局部域。

英文摘要:

We establish the existence and uniqueness of twisted exterior and symmetric square $γ$-factors in positive characteristic by studying the Siegel Levi case of generalized spinor groups. The corresponding theory in characteristic zero is due to Shahidi. In addition, in characteristic $p$ we prove that these twisted local factors are compatible with the local Langlands correspondence. As a consequence, still in characteristic $p$, we obtain a proof of the stability property of $γ$-factors under twists by highly ramified characters. Next we use the results on the compatibility of the Langlands-Shahidi local coefficients with the Deligne-Kazhdan theory over close local fields to show that the twisted symmetric and exterior square $γ$-factors, $L$-functions and $\varepsilon$-factors are preserved over close local fields. Furthermore, we obtain a formula for Plancherel measures in terms of local factors and we also show that they also preserved over close local fields.

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