proposition: Lemma val_intpartn0 (sh : 'P_0) : sh = [::] :> seq nat.
proof: Proof. case: sh => sh Hsh /=; move: Hsh; rewrite enum_partnP. by rewrite /enum_partn /= inE => /eqP. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(div ssralg ssrint ssrnum binomial) tools combclass sorted ordtype