Main Page | See live article | Alphabetical index In mathematics, if a set with certain properties is called a space, then a subset of which with same properties is usually called a subspace. Those with entries in Wikipedia are: Linear subspaces (also called vector subspaces) in linear algebra; Topological subspaces in topology. There is a fictional notion of subspace used in science fiction; see Hyperspace. The psychological state of the submissive partner in a BDSM scene is sometimes described as "subspace" or "sub space": see subspace (BDSM) This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.