| ∀ m. m +1 = n0 ∨ m +1 < n0 ↔ m < n0 ⊦ m +1 = n0 +1 ∨ m +1 < n0 +1 ↔ m < n0 +1 |
∀ m. m +1 = n0 ∨ m +1 < n0 ↔ m < n0 ⊦ m +1 = n0 ∨ m +1 < n0 ↔ m < n0, m = n0
Used simplifier rules: inj-1: ⊦ n +1 = n0 +1 ↔ n = n0;%rax: ⊦ n0 < n +1 ↔ ¬ ¬(n0 = n ∨ n0 < n);