Mathematics and Physics
- 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 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
Read more about this topic: Boundary
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