proposition: Lemma map_mpolyX (m : 'X_{1..n}) : map_mpoly f 'X_[m] = 'X_[m].
proof: Proof. by rewrite /map_mpoly mmapX mmap1_id. 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