proposition: Lemma cvg_einfs_sup u : einfs u @ \oo --> ereal_sup (range (einfs u)).
proof: Proof. by apply: ereal_nondecreasing_cvgn => //; exact: nondecreasing_einfs. 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