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theorem proved term proof

totient_le

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formal statement (Lean)

 129theorem totient_le (n : ℕ) : totient n ≤ n := by

proof body

Term-mode proof.

 130  simp only [totient]
 131  exact Nat.totient_le n
 132
 133/-- φ(n) > 0 iff n > 0. -/

depends on (1)

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