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Proof step 6 from proof coprime-divides (previous step)

i * i0 = j * j0, gcd(i, j) = 1 ⊦ i | j0, i | j * j0

User applied rule insert equation

And closed the goal!

Rule argument

pos: left 1 flags: rotate, discard

Additional information

Used simplifier rules: div-mult: ⊦ i | i * j;%associativity: ⊦ i * j * j0 = (i * j) * j0; from specification int-mult%commutativity: ⊦ i * j = j * i; from specification int-mult