proposition: Lemma mnmwgt1 : mnmwgt 1%M = 0%N.
proof: Proof. by rewrite mnmwgtE big1 // => /= i _; rewrite cm1. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap