proposition: Lemma cm1_eq1 i : (U_(i) == 1)%M = false.
proof: Proof. by rewrite -mdeg_eq0 mdegU. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap