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Proof step 1 from proof coprimes-one (conclusion)

⊦ coprimes(1) = 1 '

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ coprimes(i) = filterFun(λ j. gcd(i, j) = 1, count-i2j(1, i))
Proof step 3:
⊦ filterFun(λ j. gcd(1, j) = 1, count-i2j(1, 1)) = 1 '

Rule argument

spec: inst: name: coprimes-def seq: ⊦ coprimes(i) = filterFun(λ j. gcd(i, j) = 1, count-i2j(1, i)) subst: [i] → [1] flags: rewrite, current

Additional information

Used terms: 1