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Proof step 1 from proof mkbag-del-add-content-two (conclusion)

m < i, n < i, n ≠ m, i ≤ # A ⊦ (mkbag(A, i) -- A[m] -- A[n]) ++ A[m] ++ A[n] = mkbag(A, i)

System applied rule normalize

And obtained the following new goals

Proof step 2:
n < i, m < i, i ≤ # A ⊦ (mkbag(A, i) -- A[m] -- A[n]) ++ A[m] ++ A[n] = mkbag(A, i), n = m

Rule argument

Additional information