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Proof step 1 from proof union-subset (conclusion)

⊦ union(asar, n, m) ⊆ as ↔ (∀ n0. n ≤ n0 ∧ n0 < n + m → asar[n0] ⊆ as)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ union(asar, n, m) ⊆ as ↔ (∀ n0. n ≤ n0 ∧ n0 < n + m → asar[n0] ⊆ as)

Rule argument

Additional information