proposition: Lemma fpos0 x : fpos (fun _ : T => 0) x = 0 :> R.
proof: Proof. by rewrite /fpos maxxx normr0. Qed.
imports: mathcomp(all_ssreflect all_algebra) mathcomp.classical(boolp) xfinmap ereal reals discrete realseq mathcomp.classical(classical_sets functions mathcomp_extra) topology