proposition: Lemma muniE p : muni p = \sum_(m <- msupp p) p@_m *: 'X_[[multinom (m (widen i)) | i < n]] *: 'X^(m ord_max).
proof: Proof. apply/eq_bigr=> m _; rewrite XE /= -!mul_polyC. by rewrite mulrA -polyCM mul_mpolyC. 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