fact: Variables (F0 : finFieldType) (F1 : fieldExtType F0).
imports: mathcomp(all_ssreflect ssralg finalg poly polydiv) mathcomp(cyclic perm matrix mxpoly vector mxalgebra zmodp) mathcomp(finfield falgebra fieldext) ssr_ext ssralg_ext vandermonde linearcode dft poly_decoding grs bch