proposition: Lemma toZp_zero n : toZp (zero n) = 0%R.
proof: Proof. rewrite /toZp toNat_zero. by apply val_inj. Qed.
imports: Coq(ZArith.ZArith) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq fintype tuple div zmodp ssralg) ssrextra.nat ssrextra.tuple spec.spec