theorem T_measurement_vri {sigma_sq chi T : ℝ} (hchi : chi ≠ 0) (hVRI : sigma_sq = T * chi) : T = sigma_sq / chi := by rw [hVRI, mul_div_cancel_right₀ T hchi]
thesis/CESProofs/Dynamics/FluctuationResponse.lean:108
Results 8-16: Variance-Response Identity and Early Warning