proposition: Lemma nvar0_mpolyC (p : {mpoly R[0]}): p = (p@_0%MM)%:MP.
proof: Proof. by apply/mpolyP=> m; rewrite mcoeffC nvar0_mnmE eqxx mulr1. 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