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Proof step 1 from proof keys-one (conclusion)

⊦ nd '.keys = nd.key '

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ nd ' = nd + []
Proof step 3:
⊦ (nd + []).keys = nd.key '

Rule argument

spec: list, inst: node-list name: One seq: ⊦ nd ' = nd + [] subst: [nd] → [nd] flags: <all paths>

Additional information

Used terms: nd