One of the quantities λ_i appearing in the Gauss-Jacobi mechanical quadrature. They satisfy λ_1 + λ_2 + ... + λ_n | = | integral_a^b d α(x) | = | α(b) - α(a) and are given by λ_ν | = | integral_a^b [(p_n(x))/(p_n^, (x_ν)(x - x_ν))]^2 d α(x) λ_ν | = | -k_(n + 1)/k_n 1/(p_(n + 1)(x_ν) p_n^, (x_ν)) | = | k_n/k_(n - 1) 1/(p_(n - 1)(x_ν) P_n^, (x_ν)) (λ_ν)^(-1) | = | [p_0(x_ν)]^2 + ... + [p_n(x_ν)]^2, where k_n is the higher coefficient of p_n(x).
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