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Proof step 73 from proof Extsimple (previous step)

i2 / gcd(i2, j2) < 0, i1 / gcd(i1, j1) = i2 / gcd(i2, j2), j1 / gcd(i1, j1) = j2 / gcd(i2, j2), 0 < j1, 0 < j2, 0 < i1, i2 < 0 ⊦ j2 = 0, j1 = 0, i1 = 0, i2 = 0

User applied rule insert equation

And obtained the following new goals

Rule argument

pos: left 2 flags: rotate, discard

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