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Proof step 4 from proof from-cons-one (previous step)

⊦ ⌜a ' + x⌝ from 1 = ⌜x⌝

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ ⌜x⌝ from n = ⌜x from n⌝
Proof step 6:
⊦ ⌜a ' + x from 1⌝ = ⌜x⌝

Rule argument

spec: stream inst: name: from-fin seq: ⊦ ⌜x⌝ from n = ⌜x from n⌝ subst: [n, x] → [1, a ' + x] flags: rewrite, current

Additional information

Used terms: 1, a ' + x