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Boundary

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  1. In topology, the boundary of a subset S of a topological space X is the set of points which can be approached both from S and from the outside of S. More formally, it is the set of points in the closure of S, not belonging to the interior of S. An el

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 30, 2008
  2. Some authors (for example Willard, in General Topology) use the term 'frontier', instead of boundary in an attempt to avoid confusion with the concept of boundary used in algebraic topology

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 30, 2008
  3. the set of points which can be approached both from S and from outside of S

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 30, 2008
  4. A of the boundary of S is called a boundary component of S

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 30, 2008
  5. Consider the real line R with the usual topology (i.e. the topology whose basis sets are open intervals)

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on December 30, 2008
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