2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/165604The mixed spin-1/2 and spin-S (S>1/2) Ising model on a rope ladder is examined by combining two exact analytical methods. By the decoration-iteration mapping transformation, this mixed-spin system is firstly transformed to a simple spin-1/2 Ising model on the two-leg ladder, which is then exactly solved by the standard transfer-matrix method. The thermal variations of the zero-field specific heat are discussed in particular.4 pages, 2 figures, presented at conference CSMAG07, 9.-12. July 2007, Kosice, Slovakia, to be published in Acta Physica Polonica AStatistical MechanicsMaterials Sciencetext