beta exp_t3 generalized_beta get_cdf_gld get_gld_four_lambdas get_moments_upto_order get_quadpts get_quadpts_univariate_Gaussian get_source moments moments moms parameters post_process_moments product_difference solve three_term_recurrence uniform_distribution univariate_gaussian_raw univariate_lognormal univariate_lognormal_fractional