2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/31498A first order inference system, called R-calculus, is defined to develop the specifications. It is used to eliminate the laws which is not consistent with the user's requirements. The R-calculus consists of the structural rules, an axiom, a cut rule, and the rules for logical connectives. Some examples are given to demonstrate the usage of the R-calculus. The properties about reachability and completeness of the R-calculus are formally defined and are proved.14 pages with some minor errors in the original version correctedLogic in Computer ScienceProgramming LanguagesF.3.1text