(** Division *)

Lemma Lim_div (f g : R -> R) (x : Rbar) :
ex_lim f x -> ex_lim g x -> Lim g x <> 0 ->
ex_Rbar_div (Lim f x) (Lim g x) ->
Lim (fun y => f y / g y) x = Rbar_div (Lim f x) (Lim g x).