proposition: Lemma neighpr_root p x b : {in neighpr p x b, noroot p}.
proof: Proof. exact: next_noroot. Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(bigop order ssralg poly polydiv ssrnum zmodp) mathcomp(polyorder path interval ssrint)