The moments and statistical distribution of class number of primes over function fields. (English) Zbl 1479.11155
Summary: We investigate the moment and the distribution of \(L(1,\chi_P)\), where \(\chi_P\) varies over quadratic characters associated to irreducible polynomials \(P\) of degree \(2g+1\) over \(\mathbb{F}_q[T]\) as \(g\to\infty\). In the first part of the paper, we compute the integral moments of the class number \(h_P\) associated to quadratic function fields with prime discriminants \(P\), and this is done by adapting to the function field setting some of the previous results carried out by Nagoshi in the number field setting. In the second part of the paper, we compute the complex moments of \(L(1,\chi_P)\) in large uniform range and investigate the statistical distribution of the class numbers by introducing a certain random Euler product. The second part of the paper is based on recent results carried out by Lumley when dealing with square-free polynomials.
MSC:
| 11M38 | Zeta and \(L\)-functions in characteristic \(p\) |
| 11M06 | \(\zeta (s)\) and \(L(s, \chi)\) |
| 11G20 | Curves over finite and local fields |
| 11M50 | Relations with random matrices |
| 14G10 | Zeta functions and related questions in algebraic geometry (e.g., Birch-Swinnerton-Dyer conjecture) |
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