A Dirichlet series expansion for the p-adic zeta-function
- Autores: Daniel Delbourgo
- Localización: Journal of the Australian Mathematical Society, ISSN 1446-7887, Vol. 81, Nº 2, 2006, págs. 215-224
- Idioma: inglés
- DOI: 10.1017/s1446788700015846
- Enlaces
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Resumen
We prove that the p-adic zeta-function constructed by Kubota and Leopoldt has the Dirichlet series expansion \[ \zeta_p(k,\omega^{1-k}) = \frac{1}{(2-{4}\cdot{2^{-k}})} \sum_{n=1}^{\infty} \sum_{\substack{m=p^{n-1}\\ p\nmid m}}^{p^n} \frac{(-1)^{m+1}}{m^k} \quad\text{at all }\ k\in \mathbb Z,\] where the convergence of the first summation is for the p-adic topology. The proof of this formula relates the values of $\zeta_p(-s,\omega^{1+\beta})$ for $s\in\mathbb Z_p$, with a branch of the `$s^{\text{th}}$-fractional derivative' of a suitable generating function.
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