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Proof step 6 from proof prefixpoint-aux (previous step)

∀ S. f(S) ⊆ S → S(x), monotone(f), f(S) ⊆ S ⊦ S(x)

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 1 terms: S

Additional information

Used terms: S