Subspace may refer to:

Mathematics

  • Subspace (mathematics), a particular subset 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,<!-- linear manifold or linear variety, is--> 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

  • Also known as hyperspace<!--as stated in http://www.sf-encyclopedia.com/entry/space_warp-->
  • Subspace (Star Trek), a theoretical 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