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Proof step 19 from proof max-perm (previous step)

i < max(ints0 -1l i), i ∈ ints0, perm(ints1, ints0 -1l i) ⊦ ints1 = [], max(ints0 -1l i) = max(ints0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 20:
⊦ i < max(ints) → max(ints -1l i) = max(ints)
Proof step 21:
¬ i < max(ints0), i < max(ints0 -1l i), i ∈ ints0, perm(ints1, ints0 -1l i) ⊦ ints1 = [], max(ints0 -1l i) = max(ints0)

Rule argument

spec: inst: name: max-del1 seq: ⊦ i < max(ints) → max(ints -1l i) = max(ints) subst: [i, ints] → [i, ints0] flags: rewrite, current

Additional information

Used terms: i, ints0