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Proof step 5 from proof succ-05 (previous step)

n0 - 1 = 0, m = n0 + n, n + 1 < m, n ≤ m ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
n0 - 1 = 0 ⊦ n0 = 1, n0 = 0

Rule argument

Additional information

Used simplifier rules: lep: ⊦ m ≤ m + n;% ⊦ 1 < m ↔ ¬(m = 0 ∨ m = 1); (s)% ⊦ m + n < m + n0 ↔ n < n0; (s)%c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic