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Proof step 4 from proof euler-phi-prime (previous step)

prime(i) ⊦ i = n→i(# coprimes(i)) + 1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ prime(i) → coprimes(i) = count-i2j(1, i - 1)
Proof step 6:
prime(i), prime(i) ⊦ i = n→i(# count-i2j(1, i - 1)) + 1

Rule argument

spec: inst: name: coprimes-prime seq: ⊦ prime(i) → coprimes(i) = count-i2j(1, i - 1) subst: [i] → [i] flags: rewrite, current

Additional information

Used terms: i