Polynomial behavior of special values of partial zeta function of real quadratic fields at s=0

Details Polynomial behavior of special values of partial zeta function of real quadratic fields at s=0 Polynomial behavior of special values of partial zeta function of real quadratic fields at s=0

2011-11-29

arxiv.org/abs/1111.6717v1

Mathematics

Number Theory

21 pages

Scientific paper

We compute the special values of partial zeta function at $s=0$ for family of real quadratic fields $K_n$ and ray class ideals $\fb_n$ such that $\fb_n^{-1} = [1,\delta(n)]$ where the continued fraction expansion of $\delta(n)$ is purely periodic and each terms are polynomial in $n$ of bounded degree $d$. With an additional assumptions, we prove that the special values of partial zeta function at $s=0$ behaves as quasi-polynomial. We apply this to obtain that the special values the Hecke's $L$-functions at $s=0$ for a family of for a Dirichlet character $\chi$ behave as quasi-polynomial as well. We compute out explicitly the coefficients of the quasi-polynomials. Two examples satisfying the condition are presented and for these families the special values of the partial zeta functions at $s=0$.

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