proposition: Lemma horner_int n x : (n%:~R : {poly R}).[x] = n%:~R.
proof: Proof. by rewrite hornerMz hornerC. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg countalg ssrnum) mathcomp(poly)