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theorem proved term proof

harmonic1_matches

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formal statement (Lean)

 174theorem harmonic1_matches : |schumannRS 1 - 7.83| < 0.03 := by

proof body

Term-mode proof.

 175  rw [harmonic1_eq, abs_lt]
 176  exact ⟨by nlinarith [phi_gt_1618], by nlinarith [phi_lt_1619]⟩
 177
 178/-- f(2) = 7φ + 3 ∈ (14.326, 14.333): matches measured 14.3 Hz within 0.04 Hz. -/

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depends on (6)

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