proposition: Fact subfx_inv0 : subfext_inv (0 : subFExtend) = (0 : subFExtend).
proof: Proof. apply/eqP; rewrite !piE /equiv_subfext /iotaFz /subfx_inv_rep !linear0. by rewrite /subfx_poly_inv rmorph0 eqxx mod0p !linear0. 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)