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Proof step 7 from proof negate (previous step)

0 < j ⊦ rational(i, j).num + (~ rational(i, j)).num = 0 ∧ rational(~ i, j).denom = (~ rational(i, j)).denom

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
⊦ rational(~ i, j).denom = rational(i, j).denom
Proof step 9:
0 < j ⊦ rational(i, j).num + (~ rational(i, j)).num = 0 ∧ rational(i, j).denom = (~ rational(i, j)).denom

Rule argument

name: denom-neg-01 rotate: F subst: [j, i] → [j, i]

Additional information

Used terms: j, i