proposition: Lemma O11 : ((0 <= 1 :> R) && (1 <= 1 :> R))%R.
proof: Proof. by apply /andP; split; [rewrite ler01| rewrite lexx]. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum) mathcomp(reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(lra ring Rstruct)