for IAlph, OAlph being non empty set
for tfsm being non empty Mealy-FSM over IAlph,OAlph
for k being Nat st Class (k -eq_states_EqR tfsm) = Class ((k + 1) -eq_states_EqR tfsm) holds
for m being Nat holds Class ((k + m) -eq_states_EqR tfsm) = Class (k -eq_states_EqR tfsm)