proposition: Lemma rpred_Cnat (S : semiringClosed algC) x : x \in Cnat -> x \in S.
proof: Proof. exact: rpred_nat_num. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun ssrnat eqtype seq choice) mathcomp(div fintype path bigop finset prime order ssralg) mathcomp(poly polydiv mxpoly generic_quotient countalg) mathcomp(ssrnum closed_field ssrint archimedean rat intdiv) mathcomp(algebraics_fundamentals)