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Proof step 7 from proof num-neg-03 (previous step)

⊦ rational(0, 1).num + (~ rational(0, 1)).num = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
⊦ (~ rational(0, 1)).num = 0

Rule argument

Additional information

Used simplifier rules: numerator-zero: ⊦ rational(0, j).num = 0;% ⊦ i + j = j + i;% ⊦ i + j + i0 = (i + j) + i0;% ⊦ i + 0 = i;