“…Also, it should be mentioned that the general spin-1 model can be mapped onto the spin-1/2 Ising model, under certain constrained conditions, which determine the corresponding subspaces of interaction parameters (J, L, K, h, ∆) 46 . The Ising model with spin 1/2, 1 and with general spin has been also studied by means of the Green's function formalism 47,48,49,50,51,52,53,54,55,56 . These studies do not lead to a complete solution, but to a series of exact relations among the spin correlation functions.…”