# State diagram and an unknown table

I am wondering what kind of table that is, is that perhaps a state table? I am not sure what $q_1$ and $q_2$ stand for. They don't look like next state functions since these are denoted $q^+$ in my book.

• Looks like a suggested state encoding. – Dmitry Grigoryev Sep 6 '16 at 13:55
• You will need 2 next-state equations. One for q1+ and one for q2+ (besides an equation for your output which is specified by the "Y" term in the X/Y designations). – Tut Sep 6 '16 at 15:15

$q_x$ is most often the name of an output. Typically the output of gates or more complex circuit blocks.
Here the combination of the variables $q_1$ and $q_2$ and the state is bijunctive, so they are somehow equivalent to the state itself. The state seems to be altered by different input values of a circuit or gate as shown by the $X/Y$ notation at the branches of the diagram.