proposition: Lemma dvg_inP {U : Type} (T : filteredType U) (F : set_system U) : ~ [cvg F in T] -> [lim F in T] = point.
proof: Proof. by rewrite /lim_in /=; case xgetP. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra finmap generic_quotient) mathcomp(boolp classical_sets functions) mathcomp(cardinality mathcomp_extra fsbigop) reals signed