Distinguished representations, base change, and reducibility for unitary groups

Distinguished representations, base change, and reducibility for unitary groups
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酉群的杰出表示、基变和可约性

DOI:
10.1155/imrn.2005.841
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发表时间:
2004
影响因子:
1
通讯作者:
C. Rajan
C. Rajan
中科院分区:
数学1区
文献类型:
--
作者:
U. K. Anandavardhanan;C. Rajan

文献摘要

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证明了对于GL n(E)的平方可积表示,通过Rankin-Selberg方法和Langlands-Shahidi方法定义的局部Asai L-函数的等价性.因此,我们刻画了U(n,n)的某些诱导表示的约化,以及从U(n)到GL n(E)的基变映射的象的GL n(F)-可约性.我们还精确地确定了当GL n(E)的Steinberg表示相对于F的一个特征是不同的。
We show the equality of the local Asai L-functions defined via the Rankin-Selberg method and the Langlands-Shahidi method for a square-integrable representation of GL n (E). As a consequence, we characterize reducibility of certain induced representations of U(n,n), and the image of the base change map from U(n) to GL n (E) in terms of GL n (F)-distinguishedness. We also determine precisely when the Steinberg representation of GL n (E) is distinguished with respect to a character of F ∗ .