fact: Definition co_hp (la : 'P_d) : pol -> algC := homsymdotr 'hp[la] \o in_homsym d (R := algC).
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssrint rat ssralg ssrnum algC matrix vector) mathcomp(mpoly) tools partition ordtype antisym Schur_mpoly Schur_altdef sympoly homogsym permcent