Remarks on the Symmetric Powers of Cusp Forms on GL(2)

Remarks on the Symmetric Powers of Cusp Forms on GL(2)
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DOI:
10.1090/conm/488/09570
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发表时间:
2007-10
期刊:
arXiv: Number Theory
影响因子:
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通讯作者:
Dinakar Ramakrishnan
Dinakar Ramakrishnan
中科院分区:
其他
文献类型:
--
作者:
Dinakar Ramakrishnan

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本文证明了如下条件结果:设F是数域,π是GL(2)/F上的尖点形式,且GL(2)/F是不可解多面体。假设所有对称幂sym(m)(π)都是模的,即,定义GL(m + 1)/F上的自守形式。如果sym^6(π)是尖点的,那么sym^(m)(π)也是尖点的,对所有的m。此外,sym^(6)(π)是Eisensteinian当且仅当sym^(5)(π)是GL(2)/F上π与尖点形式π'的对称平方的函积的阿贝尔扭曲。
In this paper we prove the following conditional result: Let F be a number field, and π a cusp form on GL(2)/F which is not solvable polyhedral. Assume that all the symmetric powers sym^(m)(π) are modular, i.e., define automorphic forms on GL(m + 1)/F. If sym^6(π) is cuspidal, then so are the sym^(m)(π), for all m. Moreover, sym^(6)(π) is Eisensteinian iff sym^(5)(π) is an abelian twist of the functorial product of π with the symmetric square of a cusp form π' on GL(2)/F.