fact: Definition lfun_algMixin := GRing.Lalgebra_isAlgebra.Build R lfun_lalgType (fun k x y => comp_lfunZl k y x).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)