proposition: Fact nonzero1fx : subfext1 != subfext0.
proof: Proof. rewrite !piE /equiv_subfext /iotaFz !linear0. by rewrite poly_rV_K ?rmorph1 ?oner_eq0 // size_poly1. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq div) mathcomp(choice fintype tuple finfun bigop ssralg countalg) mathcomp(finalg zmodp matrix vector falgebra poly polydiv) mathcomp(mxpoly generic_quotient)