fact: Definition coefE := (coef0, coef1, coefC, coefX, coefXn, coef_sumMXn, coefZ, coefMC, coefCM, coefXnM, coefMXn, coefXM, coefMX, coefMNn, coefMn, coefN, coefB, coefD, coef_even_poly, coef_odd_poly, coef_take_poly, coef_drop_poly, coef_cons, coef_Poly, coef_poly, coef_deriv, coef_nderivn, coef_derivn, coef_map, coef_sum, coef_comp_poly_Xn, coef_comp_poly).
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)