Source: wikibot/closed-set
= Closed set
{wiki=Closed_set}
In topology, a **closed set** is a fundamental concept related to the structure of a topological space. A subset \\( C \\) of a topological space \\( X \\) is called closed if it contains all its limit points. Here are some important properties and characteristics of closed sets: 1. **Complement**: A set is closed if its complement (with respect to the whole space \\( X \\)) is open.