Subspace

Subspace may refer to:

Mathematics

 * A space inheriting all characteristics of a parent space
 * A subset of a topological space endowed with the subspace topology
 * Linear subspace, in linear algebra, a subset of a vector space that is closed under addition and scalar multiplication
 * Flat (geometry), a Euclidean subspace
 * Affine subspace, a geometric structure that generalizes the affine properties of a flat
 * Projective subspace, a geometric structure that generalizes a linear subspace of a vector space
 * Multilinear subspace in multilinear algebra, a subset of a tensor space that is closed under addition and scalar multiplication

Science fiction

 * a concept similar to that of hyperspace
 * Subspace (Star Trek), a fictional feature of space-time that facilitates faster-than-light communication and transit

Games

 * SubSpace (video game), a two-dimensional space shooter computer game
 * The Subspace Emissary, the Adventure mode in the video game Super Smash Bros. Brawl

Other uses

 * "Subspace" (song), a 2001 single by Funker Vogt
 * Subspace, in BDSM, a psychological state that can be entered by the submissive participant