2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/217817Let Q_0 denote the rational numbers expanded to a meadow by totalizing inversion such that 0^{-1}=0. Q_0 can be expanded by a total sign function s that extracts the sign of a rational number. In this paper we discuss an extension Q_0(s ,\sqrt) of the signed rationals in which every number has a unique square root.9 pagesLogic in Computer Sciencetext