proposition: Lemma norm_cvgi_unique {U : Type} {F} {FF : ProperFilter F} (f : U -> set V) : {near F, is_fun f} -> is_subset1 [set x : V | f `@ F --> x].
proof: Proof. exact: cvgi_unique. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrint ssrnum finmap matrix) mathcomp(rat interval zmodp vector fieldext falgebra) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality set_interval Rstruct) ereal reals signed topology prodnormedzmodule