Module MemoryLemmas.
Global Notation "a # b" := (Maps.PMap.get b a) (at level 1).
Transparent Mem.store.
Transparent Mem.alloc.

Lemma permission_at_alloc_4:
forall m m' lo hi nb b ofs
(Halloc: Mem.alloc m lo hi = (m', nb))
(Hb: b <> nb),
forall k, permissions.permission_at m b ofs k =
permissions.permission_at m' b ofs k.