(** ** Constant functions *)

(* Specifications: *)
Lemma is_RInt_const :
forall (a b : R) (v : V),
is_RInt (fun _ => v) a b (scal (b - a) v).
Lemma ex_RInt_const :
forall (a b : R) (v : V),
ex_RInt (fun _ => v) a b.