Source: wikibot/4-manifold
= 4-manifold
{wiki=4-manifold}
A 4-manifold is a topological space that locally resembles \\(\\mathbb\{R\}^4\\) (four-dimensional Euclidean space) and is a type of manifold—a fundamental concept in topology and differential geometry. Formally, a 4-manifold \\(M\\) is a space that is Hausdorff, second countable, and locally homeomorphic to \\(\\mathbb\{R\}^4\\).