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arXiv 0704.0924math.NT
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全纯尖点新形式族1级密度中的低阶项

Lower order terms in the 1-level density for families of holomorphic cuspidal newforms

Steven J. Miller

摘要:

Katz Sarnak密度猜想指出,在导体趋于无穷大的极限中,L函数族中心点附近的归一化零点的行为与U(N)的子群1附近的本征值的N -> oo标度极限一致。这方面的证据已被发现为许多家庭通过研究的n-能级密度;适当限制的检验函数的主要条款同意随机矩阵理论。特别地,所有秩为r且函数方程的符号分布相同的单参数椭圆曲线族具有相同的极限行为。我们打破了这种普遍性,并发现家庭依赖的低阶校正项在许多情况下,这些低阶项的应用范围从过剩的秩到建模的零点附近的中心点的行为,并依赖于家庭的算术。我们推导出GL(2)L-函数的另一种形式的显式公式,用傅里叶系数lambda_f(p)的矩和代替Satake参数的幂和,从而简化了比较。我们的公式突出了我们期望存在的差异,从家庭的傅里叶系数服从不同的法律(例如,我们期望Sato-Tate仅适用于非CM家庭的椭圆曲线)。此外,通过Rosen和Silverman的工作,我们期望秩超过Q(T)的椭圆曲线族中的傅里叶系数的低阶偏差;这些偏差可以在我们的展开式中看到。我们分析了几个椭圆曲线族,并看到不同的低阶校正,这取决于该族是否具有复乘、强迫扭点或Q(T)上的非零秩。

英文摘要:

The Katz-Sarnak density conjecture states that, in the limit as the conductors tend to infinity, the behavior of normalized zeros near the central point of families of L-functions agree with the N -> oo scaling limits of eigenvalues near 1 of subgroups of U(N). Evidence for this has been found for many families by studying the n-level densities; for suitably restricted test functions the main terms agree with random matrix theory. In particular, all one-parameter families of elliptic curves with rank r over Q(T) and the same distribution of signs of functional equations have the same limiting behavior. We break this universality and find family dependent lower order correction terms in many cases; these lower order terms have applications ranging from excess rank to modeling the behavior of zeros near the central point, and depend on the arithmetic of the family. We derive an alternate form of the explicit formula for GL(2) L-functions which simplifies comparisons, replacing sums over powers of Satake parameters by sums of the moments of the Fourier coefficients lambda_f(p). Our formula highlights the differences that we expect to exist from families whose Fourier coefficients obey different laws (for example, we expect Sato-Tate to hold only for non-CM families of elliptic curves). Further, by the work of Rosen and Silverman we expect lower order biases to the Fourier coefficients in families of elliptic curves with rank over Q(T); these biases can be seen in our expansions. We analyze several families of elliptic curves and see different lower order corrections, depending on whether or not the family has complex multiplication, a forced torsion point, or non-zero rank over Q(T).

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