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Proof step 4 from proof indices-where-in (conclusion)

⊦ n ∈ ar.indicesWhere(φ) ↔ n < # ar ∧ φ(ar[n])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ ar.indicesWhere(φ) = ar.indicesWhere(φ, # ar)

Rule argument

spec: inst: name: indiceswhere seq: ⊦ ar.indicesWhere(φ) = ar.indicesWhere(φ, # ar) subst: [φ, ar] → [φ, ar] flags: rewrite, current

Additional information

[Concretesimprules(()), Extraterms((φar))]