Non-metric spaces {3-manifold} can have three dimensions. 3-manifolds are possible three-dimensional topologies. The simplest compact 3-manifold is a 3-sphere. Other 3-manifolds have edges or have multiple paths from one region to another. People know all 3-manifold types. Manifolds can have orientation or not.
Mathematical Sciences>Topology>Surface>Manifold
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Date Modified: 2022.0224