proposition: Lemma mmeasureX mf m : mmeasure mf 'X_[R, m] = (mf m).+1.
proof: Proof. by rewrite mmeasureE msuppX big_seq1. 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