proposition: Lemma horner_polyC u x : u.[x%:P] = swapXY u ^ eval x.
proof: Proof. by rewrite -horner_swapXY swapXYK. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype choice ssrnat seq) mathcomp(fintype tuple finfun bigop fingroup perm div) mathcomp(ssralg zmodp matrix mxalgebra) mathcomp(poly polydiv mxpoly binomial)