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def definition def or abbrev

reciprocalPrimeSum

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 239noncomputable def reciprocalPrimeSum (n : ℕ) : ℝ :=

proof body

Definition body.

 240  n.factorization.sum fun p k => (k : ℝ) / (p : ℝ)
 241
 242/-- Per-summand identity: each prime-power contribution to `c(n)` decomposes
 243    into half of `k·p`, half of `k/p`, minus `k`.  Used to derive the
 244    closed-form decomposition below. -/

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