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Proof step 1 from proof in-dels-ro (conclusion)

⊦ key ∈ ri ⊖ ks ↔ key ∈ ri ∧ ¬ key ∈ ks ∧ (key.data? → ¬ inodekey(key.ino) ∈ ks)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: <toplevel> name: dels-with-data seq: ⊦ ri ⊖ ks = (ri \ ks) \ datakeys(ks, ri) subst: [ks, ri] → [ks, ri] flags: <all paths>

Additional information

Used terms: ks, ri