fact: Definition limit_v2 (f: nat -> T)(x: T) := (forall (n:nat), (f n < x)%O) /\ (forall y : T, (y < x)%O -> exists n : nat, (y <= f n)%O).
imports: mathcomp(all_ssreflect zify) mathcomp(fintype) Coq(Logic.Eqdep_dec) Coq(Wellfounded.Inclusion Wf_nat Inverse_Image)