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[tlaplus] Spec formula for Peterson algorithm
"The temporal formula Spec is the complete
specification. It characterizes behaviors (ω-sequences of states) that start in a
state satisfying Init and where every pair of successive states either satisfies Next
or else leaves the values of the tuple vars unchanged."
I'm having problem with understanding of tuple vars in specified formula. Can anyone explain to me how these variables (turn, flag and pc) relate to tuple vars? I can understand that some variables stays unchanged during verification, but couldn't get it in final Spec temporal formula.
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