proposition: Lemma dhomogX d m: ('X_[m] \is [in R[n], d.-homog]) = (mf m == d).
proof: Proof. by rewrite dhomogE msuppX /= andbT. 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