Section is_derive_mult.
Context {K : AbsRing}.
End is_derive_mult.
(** * Exponential function *)
(** Definition *)
(** Limits *)

Lemma is_lim_exp_p : is_lim (fun y => exp y) p_infty p_infty.
Lemma is_lim_exp_m : is_lim (fun y => exp y) m_infty 0.