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arXiv 1507.02640math.NT
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超椭圆系综中$L(\frac{1}{2},χ)$的二阶和三阶矩

The second and third moment of $L(\frac{1}{2},χ)$ in the hyperelliptic ensemble

Alexandra Florea

摘要:

在函数域的设置下,得到了二次Dirichlet $L$ -函数在临界点的二阶和三阶矩的渐近公式.我们固定基域$\mathbb{F}_q$,并为简单起见假设$q$是素数,具有$q \equiv 1 \pmod 4$。当$D$是一元的、无平方次数的$2g+1$多项式时,我们计算$L(1/2,χ_D)$的二阶和三阶矩,作为$g \to \infty$。第二时刻的结果与Andrade和Keating的简化公式一致。对于第三个时刻,我们检查的领导项同意的猜想。

英文摘要:

We obtain asymptotic formulas for the second and third moment of quadratic Dirichlet $L$--functions at the critical point, in the function field setting. We fix the ground field $\mathbb{F}_q$, and assume for simplicity that $q$ is a prime with $q \equiv 1 \pmod 4$. We compute the second and third moment of $L(1/2,χ_D)$ when $D$ is a monic, square-free polynomial of degree $2g+1$, as $g \to \infty$. The answer we get for the second moment agrees with Andrade and Keating's conjectured formula. For the third moment, we check that the leading term agrees with the conjecture.

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