Subspace

• 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, 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

• Also known as hyperspace
• Subspace (Star Trek), a fictional feature of space-time that facilitates faster-than-light communication and transit

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

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

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