L-functions with n-th order twists
L-functions with n-th order twists
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DOI:
10.1093/imrn/rns257
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发表时间:
2011-12
期刊:
影响因子:
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通讯作者:
V. Blomer;Leo Goldmakher;Benoît Louvel
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文献类型:
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作者:
V. Blomer;Leo Goldmakher;Benoît Louvel
Let K be a number field containing the n-th roots of unity for some n > 2. We prove a uniform subconvexity result for a family of double Dirichlet series built out of central values of Hecke L-functions of n-th order characters of K. The main new ingredient, possibly of independent interest, is a large sieve for n-th order characters. As further applications of this tool, we derive several results concerning L(s,\chi) for n-th order Hecke characters: an estimate of the second moment on the critical line, a non-vanishing result at the central point, and a zero-density theorem.