“…The set theoretic approaches, including the papers of Mesarovic [25], Salovaara [32], Macko [23], [24], Windeknecht [37] and Zadeh [39], 40], take the state as an equivalence class of inputs which in some sense generalizes the Krohn-Rhodes theory of automata 19], 20]. The set theoretic approaches, including the papers of Mesarovic [25], Salovaara [32], Macko [23], [24], Windeknecht [37] and Zadeh [39], 40], take the state as an equivalence class of inputs which in some sense generalizes the Krohn-Rhodes theory of automata 19], 20].…”