I've seen a picture of an automata represented as a DFA but it has arrows that has nothing on it!
What do these arrows mean in DFA? I mean are they different from epsilon (ε) , because we do not have ε in DFA ! what are they doing ?
And sorry if my question is a bit weird.
can a DFA have an arrow with empty string as input?
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The implied alphabet is {0,1}. So for states with two transitions out, only one needs to be marked, as is the case. If that one is marked "0", the other one is implicitly a 1. If that one is marked "1", the other one is implicitly a 0. For states with one transitions out, that transition represents (1,0).