proposition: Fact subfx_inj_is_additive : additive subfx_inj.
proof: Proof. by elim/quotW => x; elim/quotW => y; rewrite !piE /iotaFz linearB rmorphB. 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)