Show that the subsets of the plane in Exercises 1821 are
Chapter , Problem 18(choose chapter or problem)
Show that the subsets of the plane in Exercises 1821 are open: A = {(x, y) | 1 < x < 1, 1 < y < 1}
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer