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It doesn't have non-deterministic paths.

Every transition is one-to-one.

Accepted states are defined/guaranteed on specific inputs.

Not sure why its not an FA

Edit: 0.0.2

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1 Answers1

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Nvm, figured it out.

The transition function $\delta$ must be total in a FA.

In the 1st example, at the accepting state $q_1$, $\delta(q_1, 0)=undefined$.

Whereas in the 2nd example, if we label the states $q_0, q_1,q_2$ from left to right, at the accepting state $q_1$, $\delta(q_1, 0)=q_2$.

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    OK. Not every author uses that convention. As I wrote in the comments, some authors use the convention that missing transitions go to a state like the one you call $q_2$ and I call a "black hole". – Gerry Myerson Mar 31 '19 at 02:26
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    I'm going off on a tangent, and it's a pretty trivial thing anyway, but it's never correct to write "$= undefined$", because "undefined" isn't an expression or a variable, it's an adjective. It's a bit like writing "$6 = even$". – Tanner Swett Mar 31 '19 at 03:59