theorem
proved
term proof
costSpectrumValue_prime
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formal statement (Lean)
146theorem costSpectrumValue_prime {p : ℕ} (hp : Nat.Prime p) :
147 costSpectrumValue p = primeCost p := by
proof body
Term-mode proof.
148 unfold costSpectrumValue
149 rw [Nat.Prime.factorization hp]
150 simp [Finsupp.sum_single_index]
151
152/-- For a prime power `p^k`, `c(p^k) = k · J(p)`. -/