Source: wikibot/join-topology
= Join (topology)
{wiki=Join_(topology)}
In the context of topology, a **join** is an operation that combines two topological spaces into a new space. Given two topological spaces \\( X \\) and \\( Y \\), the join of \\( X \\) and \\( Y \\), denoted \\( X * Y \\), is constructed in a specific way. The join \\( X * Y \\) can be visualized as follows: 1. **Take the Cartesian product** \\( X \\times Y \\).