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Proof step 18 from proof even-add (previous step)

m0 = n0 + m1 ∧ m1 ≤ m0, 2 * m0 = 2 * m1 + n ⊦ 2 * n0 = n

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
2 * (n0 + m1) = 2 * m1 + n ⊦ 2 * n0 = n

Rule argument

Additional information

Used simplifier rules: c: ⊦ m + n = n + m; from specification nat-basic2%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic2%lep: ⊦ m ≤ m + n; from specification nat