Best Answer

In Set Theory: a set is closed under an operation if performance of that operation on members of the set always produces a member of the same set.

In Topology: a closed set is a set which contains all its limit points.

User Avatar

Wiki User

8y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What does the word closed mean in math terms?
Write your answer...
Still have questions?
magnify glass