Definition restrPermMap p' m (Hlt: permMapLt p' (getMaxPerm m)) : mem.

Lemma restrPermMap_ext:
forall p1 p2 m
(P1: permMapLt p1 (getMaxPerm m))
(P2: permMapLt p2 (getMaxPerm m)),
(forall b, (p1 !! b) = (p2 !! b)) ->
restrPermMap P1 = restrPermMap P2.