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Proof step 2 from proof iterate-is-fix (previous step)

μ(f)(x), cont(f) ⊦ ∃ n. ((f ^ n))(λ x. false)(x)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ μ(f)(x) ↔ (∀ S. f(S) ⊆ S → S(x))
Proof step 4:
∀ S. f(S) ⊆ S → S(x), cont(f) ⊦ ∃ n. ((f ^ n))(λ x. false)(x)

Rule argument

spec: monotone-set-fixpoint inst: name: least-prefixpoint-def seq: ⊦ μ(f)(x) ↔ (∀ S. f(S) ⊆ S → S(x)) subst: [x, f] → [x, f] flags: rewrite

Additional information

Used terms: x, f