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Proof step 3 from proof coprimes-one (previous step)

⊦ filterFun(λ j. gcd(1, j) = 1, count-i2j(1, 1)) = 1 '

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
⊦ filterFun(λ j. true, 1 ') = 1 '

Rule argument

Additional information

Used simplifier rules: count-one: ⊦ count-i2j(j, j) = j ';%gcd-com: ⊦ gcd(i, j) = gcd(j, i); from specification int-gcd%gcd-one-01: ⊦ gcd(i, 1) = 1; from specification int-gcd