proposition: Lemma partdom_colpartn sh : (colpartn d <= sh :> 'PDom)%O.
proof: Proof. by rewrite -partdom_conj_intpartn conj_colpartn partdom_rowpartn. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(div ssralg ssrint ssrnum binomial) tools combclass sorted ordtype