proposition: Lemma mmeasureC c : mmeasure c%:MP = (c != 0%R) :> nat.
proof: Proof. rewrite mmeasureE msuppC; case: (_ == 0)=> /=. by rewrite big_nil. by rewrite big_seq_fset1 mf0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap