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Proof step 7 from proof leq-leninv (previous step)

leninv(nσ) = ⌜0⌝ , ⌜n⌝ < # nσ, stutf(nσ) ⊦ nσ[n] = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: inst: name: leninv-zero seq: ⊦ stutf(nσ) → (leninv(nσ) = ⌜0⌝ ↔ nσ = ⌜λ n. 0⌝ ) subst: [nσ] → [nσ] flags: rewrite, current

Additional information

Used simplifier rules: sel-inf: ⊦ ⌜nnf⌝ [n] = nnf(n); from specification stream[natstream] Used terms: nσ