proposition: Lemma lfunE (ff : {linear aT -> rT}) : linfun ff =1 ff.
proof: Proof. by move=> v; rewrite 2!unlock /= mul_rV_lin1 /= !v2rK. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)