proposition: Lemma meet_intpartnC sh1 sh2 : meet_intpartn sh1 sh2 = meet_intpartn sh2 sh1.
proof: Proof. by apply val_inj; rewrite /= parttuple_minnC. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(div ssralg ssrint ssrnum binomial) tools combclass sorted ordtype