proposition: Fact kHomExtend_additive_subproof : additive kHomf.
proof: Proof. by move=> a b; rewrite /kHomf !raddfB hornerD hornerN. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq div) mathcomp(choice fintype tuple finfun bigop ssralg poly) mathcomp(polydiv finset fingroup morphism quotient perm) mathcomp(action zmodp cyclic matrix mxalgebra vector) mathcomp(falgebra fieldext separable)