def
definition
def or abbrev
det2Factor
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formal statement (Lean)
94noncomputable def det2Factor (p : ℕ) (σ : ℝ) : ℝ :=
proof body
Definition body.
95 (1 - (p : ℝ) ^ (-σ)) * Real.exp ((p : ℝ) ^ (-σ))
96
97/-- The log of the per-prime factor:
98 log det₂_factor = log(1 − p^{−σ}) + p^{−σ}.
99 For |z| < 1: log(1−z) + z = −∑_{m≥2} z^m/m,
100 so |log det₂_factor| ≤ p^{−2σ}/(1 − p^{−σ}). -/