∀ {α : Type u} [inst : LE α] [inst_1 : LT α] [DecidableLT α] [inst_3 : Std.PRange.UpwardEnumerable α]
  [Std.PRange.LinearlyUpwardEnumerable α] [Std.PRange.LawfulUpwardEnumerableLE α]
  [Std.PRange.LawfulUpwardEnumerableLT α] [inst_7 : Std.PRange.InfinitelyUpwardEnumerable α] [Std.Rxo.IsAlwaysFinite α]
  [Std.PRange.LawfulUpwardEnumerable α] {lo hi a : α},
  (Std.PRange.succ a ∈ (Std.PRange.succ lo)...Std.PRange.succ hi) ↔ a ∈ lo...hi