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Boundary or Boundaries may refer to:

  • Border, in political geography


Mathematics and physics[edit]

  • Boundary (topology), the closure minus the interior of a subset of a topological space; an edge in the topology of manifolds, as in the case of a 'manifold with boundary'
  • Boundary (chain complex), its abstractization in chain complexes
  • Boundary value problem, a differential equation together with a set of additional restraints called the boundary conditions
  • Boundary (thermodynamic), the edge of a thermodynamic system across which heat, mass, or work can flow

Psychology and sociology[edit]



Other uses[edit]

See also[edit]