Tetrahedron approximation of the Cluster Variation Method and the Path Probability Method are employed for an f.c.c. disordered system, and the time evolution of spin configuration, which is regarded as the first approximation to an alloy system, is investigated. The convergent values at infinite time exactly coincides with the cluster probabilities independently obtained by the Cluster Variation Method for thermal equilibrium system. Furthermore, the kinetic path is placed on the thermodynamic configurational space spanned by correlation functions.
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