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def definition def or abbrev

rs_drag_redshift

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formal statement (Lean)

  99def rs_drag_redshift : ℝ := 1060

proof body

Definition body.

 100
 101/-- **SOUND HORIZON** (simplified formula valid for matter+radiation):
 102    r_s ≈ (2/3) × (c / k_eq) × √(6/R_eq) × ln[...]
 103    where k_eq is the wavenumber at matter-radiation equality.
 104
 105    Numerically: r_s ≈ 147 Mpc. -/

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