Show that a set F ~ R is closed if and only if it contains all of its boundary points
Chapter 11, Problem 12(choose chapter or problem)
Show that a set F ~ R is closed if and only if it contains all of its boundary points.
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