theorem iv_consistent {ρ covZX : ℝ} (hrel : ivRelevance covZX) :
ivEstimator (ρ * covZX) covZX = ρ := by
simp only [ivEstimator, ivRelevance] at *
exact mul_div_cancel_of_imp (fun h => absurd h hrel)CES Estimation Theory: Connecting Theory to Data