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arXiv 0908.1240math.NT
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指数和的广义Airy族的对称幂的L函数:ell-adic和p-adic方法

L-functions of symmetric powers of the generalized Airy family of exponential sums: ell-adic and p-adic methods

C. Douglas Haessig, Antonio Rojas-Leon

摘要:

对于有限域F_q上的非平凡加性特征标,映射t \mapsto \sum_{x \in F_q} n(f(x)+tx)是映射t \mapsto n(f(t))$的傅里叶变换.众所周知,这有一个上同调的解释,产生一个连续的ell-adic伽罗瓦表示。本文利用ell-adic和p-adic方法研究了这种表示的k次对称幂上的L-函数。利用ell-adic技巧,我们给出了这类L-函数的阶的一个显式公式,并确定了它的根的复绝对值。利用p-adic技巧,研究了根的p-adic绝对值。

英文摘要:

For ψa nontrivial additive character on the finite field F_q, the map t \mapsto \sum_{x \in F_q} ψ(f(x)+tx) is the Fourier transform of the map t \mapsto ψ(f(t))$. As is well-known, this has a cohomological interpretation, producing a continuous ell-adic Galois representation. This paper studies the L-function attached to the k-th symmetric power of this representation using both ell-adic and p-adic methods. Using ell-adic techniques, we give an explicit formula for the degree of this L-function and determine the complex absolute values of its roots. Using p-adic techniques, we study the p-adic absolute values of the roots.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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