proposition: Lemma CrealP {x} : reflect (x^* = x) (x \is real).
proof: Proof. by rewrite CrealE; apply: eqP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)