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Proof step 1 from proof keyset-subarray-eq (conclusion)

m ≤ # kar0, m ≤ # kar1 ⊦ subarray(kar0, 0, m) = subarray(kar1, 0, m) → keyset(kar0, m) = keyset(kar1, m)

System applied rule normalize

And obtained the following new goals

Proof step 2:
subarray(kar0, 0, m) = subarray(kar1, 0, m), m ≤ # kar1, m ≤ # kar0 ⊦ keyset(kar0, m) = keyset(kar1, m)

Rule argument

Additional information