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Proof step 2 from proof two-peq (previous step)

(m + n) / 2 = m, n < m ⊦ m + n = 1

Heuristic cut applied rule cut formula

And obtained the following new goals

Proof step 3:
(m + n) / 2 = m, n < m ⊦ m + n = 1, m + n = 0

Rule argument

fma: m + n = 0

Additional information

Used simplifier rules: two-zero-01: ⊦ m = 0 → m / 2 = 0;% ⊦ m < n → n ≠ 0; (s) Used formulas: m + n = 0