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Proof step 3 from proof le-succ (previous step)

m * n ≤ m + 1 ⊦ m = 0 ∨ m = 1 ∧ n ≤ 2 ∨ 2 ≤ m ∧ n < 2

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
m * n ≤ m + 1 ⊦ m = 0, m = 1 ∧ n ≤ 2, 2 ≤ m ∧ n < 2

Rule argument

Additional information