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I was wondering if anyone could explain me how to work through the liveness analysis?
There are two main equations in use:
in[BB] = use[BB] U (out[BB] - def[BB])
out[BB] = U in[s] : for all s ∈ successor[BB]
I don’t understand the second equation – what is meant when the righ-hand side begins with union? Union with what exactly?
Thank you
It means that
out[BB]is the union of all theinsets of its successors. Putting the union operator first is a common notation.