Definition superprecise {A}  {JA: Join A}{PA: Perm_alg A}{SA: Sep_alg A} (P: pred A) :=
forall w1 w2, P w1 -> P w2 -> comparable w1 w2 -> w1=w2.

Lemma exp_sepcon1 {A}  {JA: Join A}{PA: Perm_alg A}:
forall T (P: T ->  pred A) Q,  (exp P * Q = exp (fun x => P x * Q))%pred.