proposition: Lemma comp_mpoly1 lq : 1 \mPo lq = 1.
proof: Proof. by rewrite /comp_mpoly -mpolyC1 mmapC. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finfun bigop finset binomial) mathcomp(order fingroup perm ssralg zmodp poly ssrint) mathcomp(matrix vector) mathcomp(bigenough) ssrcomplements freeg