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Proof step 13 from proof from-succ (previous step)

⊦ ⌜nf from n⌝ = ⌜nf(n) '⌝ + ⌜nf from n + 1⌝

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 14:
⊦ nf from n = (λ m. nf(n + m))
Proof step 15:
⊦ ⌜nf from n⌝ = ⌜nf(n) '⌝ + ⌜λ m. nf((n + 1) + m)⌝

Rule argument

spec: stream inst: name: from-nf seq: ⊦ nf from n = (λ m. nf(n + m)) subst: [n, nf] → [n + 1, nf] flags: rewrite, current

Additional information

Used terms: n + 1, nf