Diagram
The state diagram for a Mealy machine associates an output value with each transition edge (in contrast to the state diagram for a Moore machine, which associates an output value with each state).
When the input and output alphabet are both Σ, one can also associate to a Mealy Automata an Helix directed graph . This graph has as vertices the couples of state and letters, every nodes are of out-degree one, and the successor of is the next state of the automata and the letter that the automata output when it is instate and it reads letter . This graph is a union of cycle iff the automaton is bireversible.
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