The intersection of closed sets is closed

- The intersection of two closed sets is closed
- Prove that the countable intersection of closed sets is closed
- Finite intersection of closed sets is closed
- Infinite intersection of closed sets is closed
- Countable intersection of closed sets is closed
- The intersection of any number of closed sets is closed
- The intersection of an arbitrary family of closed sets is closed
- Prove that the intersection of any number of closed sets is closed
- Show that the intersection of an arbitrary family of closed sets is closed