Transcendency of the determinant of the Riemann operator: on higher $K$-groups

Abstract

In previous papers we investigated basic properties of the determinant $G_K(s)$ of the Riemann operator: $\mathcal{R}$ acting on ${⨁}_{n>1}{K}_n(A{)}_{\mathbb{C}}$, where $A$ is the integer ring of an algebraic number field $K$. The function $G_K(s)$ is defined as the regularized determinant \[ G_{K}(s) = {\rm det} ((s I-\mathcal{R}) | \bigoplus_{n>1} K_{n}(A)_{\mathbb{C}} ) \] with $\mathcal{R}|K_n(A{)}_{\mathbb{C}}=\frac{1-n}{2}$. We showed that $G_K(s{)}^{-1}$ is essentially the so called gamma factors of Dedekind zeta function of $K$. In this paper we study the transcendency of $G_K(s)$ for some rational numbers $s$. The result depends on types of $K$. For example, we show that $G_K(\frac{1}{3})$ is a transcendental number if $K$ is a totally imaginary and $G_K(\frac{1}{2})$ is a transcendental number otherwise.

10 pages