fact: Definition prl_dl3_ffam := Lg r (fun ij => (ext_map_prod L (fun l => Vg (psE (fS l)) (Q ij)) (fun l => Vg (psE (fS l)) (P ij)) (fun l => (graph (Vg (psf (fS l)) ij))))).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat)