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Proof step 18 from proof num-neg-03 (previous step)

gcd(i, j) = 1, 0 < j ⊦ (0r - rational(i, j)).num + i = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 19:
⊦ 0r = rational(0, 1)
Proof step 20:
gcd(i, j) = 1, 0 < j ⊦ (rational(0, 1) - rational(i, j)).num + i = 0

Rule argument

name: zero-def rotate: F subst:

Additional information

Used terms: