proposition: Corollary ex_derive_horner p x : ex_derive (horner tt p) x.
proof: Proof. exists (horner tt (deriv tt p) x); exact: is_derive_horner. Qed.
imports: Coq(ZArith Reals) Coquelicot(Coquelicot) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq fintype bigop) Flocq(Core) Stdlib MathComp Interval Xreal Basic_rec