proposition: Lemma mcoeffXn m i k : ('X_[m] ^+ i)@_k = ((m *+ i)%MM == k)%:R.
proof: Proof. by rewrite mpolyXn mcoeffX. 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