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Theorem euler-phi-prime

⊦ prime(i) → euler-phi(i) = i - 1

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 6
Used lemmas: count-i2j-length, coprimes-prime, euler-phi-def,
Used spec theorems:
- int-abs/Abs-pos
Used simplifier rules: