proposition: Lemma fun_of_lfunK : cancel (@fun_of_lfun R aT rT) linfun.
proof: Proof. move=> f; apply/val_inj/row_matrixP=> i. by rewrite 2!unlock /= !rowE mul_rV_lin1 /= !r2vK. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)