proposition: Lemma mmeasureD_le g1 g2 : (mmeasure (g1 + g2) <= maxn (mmeasure g1) (mmeasure g2))%N.
proof: Proof. rewrite {1}mmeasureE big_seq_fsetE /=. apply/bigmax_leqP=> [[i ki]] _ /=. have /fsubsetP /(_ i ki) := (msuppD_le g1 g2); rewrite in_fsetU. by rewrite leq_max; case/orP=> /mmeasure_mnm_lt->; rewrite ?orbT. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap