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Proof step 2 from proof inni-le-01 (previous step)

i→n(j) < m + n, n→i(m) + n→i(n) ≤ j ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
i→n(j) < m + n, n→i(m) + n→i(n) ≤ j ⊦

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0; (s)%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic