proposition: Lemma conj_natr x : x \is a nat_num -> x^* = x.
proof: Proof. by move/Rreal_nat/CrealP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order ssralg poly ssrnum ssrint)