Mazur manifold

The Mazur manifold is a specific type of 3-manifold that is significant in the study of topology, particularly in the study of differentiable structures on manifolds. It is a unique example of a contractible 3-manifold that is not homeomorphic to the 3-dimensional Euclidean space, \(\mathbb{R}^3\). More formally, the Mazur manifold was constructed by mathematician Włodzimierz Mazur in 1980.