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Proof step 6 from proof least-fixpoint (previous step)

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

User applied rule all left

And closed the goal!

Rule argument

pos: left 2 terms: S abort: F discard: T computed: T

Additional information

Used simplifier rules: subset-refl: ⊦ S ⊆ S; Used terms: S