fact: Definition mcoeffsE := (@mcoeff0, @mcoeffUU, @mcoeffU, @mcoeffB, @mcoeffD, @mcoeffN, @mcoeffMn, @mcoeffZ).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap