# Boundary point/Related Articles

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*See also changes related to Boundary point, or pages that link to Boundary point or to this page or whose text contains "Boundary point".*

## Parent topics

- Geometry [r]: The mathematics of spacial concepts.
^{[e]} - Topology [r]: A branch of mathematics that studies the properties of objects that are preserved through continuous deformations (such as stretching, bending and compression).
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## Subtopics

- Interior point [r]: In geometry and topology, a point of a set that is not a boundary point.
^{[e]} - Exterior point [r]: In geometry and topology, a point of a set which is not in the set and is not a boundary point.
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- Open set [r]: In geometry and topology, a set that does not contain any of its boundary points.
^{[e]} - Closed set [r]: In geometry and topology, a set that contains its boundary; the complement of an open set.
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