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def definition def or abbrev

a0_from_tau_r0

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formal statement (Lean)

 203def a0_from_tau_r0 (tau_star r0 : ℝ) : ℝ := 2 * Real.pi * r0 / tau_star ^ 2

proof body

Definition body.

 204
 205/-- The timescale constraint linking a₀ and r₀.
 206    Given τ★ and a₀, the length scale is forced. -/

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