proposition: Lemma cvg_has_inf u_ : cvgn u_ -> has_inf (u_ @` setT).
proof: Proof. by move/is_cvgN/cvg_has_sup; rewrite -has_inf_supN image_comp. Qed.
imports: mathcomp(all_ssreflect ssralg ssrint ssrnum matrix) mathcomp(interval rat) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(set_interval) reals ereal signed topology normedtype landau