2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78724Let $k$ be a number field and $\tilde k$ a fixed quadratic extension of $k$. In this paper and its companion, we find the mean value of the product of class numbers and regulators of two quadratic extensions $F,F^*\not=\tilde k$ contained in the biquadratic extensions of $k$ containing $\tilde k$.66 pagesNumber Theory11M41text