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The boundary of a set in topology. The boundary operator on a chain complex in homological algebra. The boundary operator of a differential graded algebra. The conjugate of the Dolbeault operator on complex differential forms. The boundary ∂(S) of a set of vertices S in a graph is the set of edges leaving S, which defines a cut.
A relic border is a former boundary, which may no longer be a legal boundary at all. However, the former presence of the boundary can still be seen in the landscape. For instance, the boundary between East and West Germany is no longer an international boundary, but it can still be seen because of historical markers on the landscape; it remains ...
Boundary critique, a concept about the meaning and validity of propositions; Boundary turbulence, a break in expectation of how private information is held within a group of knowledge owners; Boundary Ale, a beer made by Moosehead Breweries; Geological boundary, a boundary between different geological units
In geometry, a disk (also spelled disc) [1] is the region in a plane bounded by a circle.A disk is said to be closed if it contains the circle that constitutes its boundary, and open if it does not.
Perimeter is the distance around a two dimensional shape, a measurement of the distance around something; the length of the boundary. A perimeter is a closed path that encompasses, surrounds, or outlines either a two dimensional shape or a one-dimensional length. The perimeter of a circle or an ellipse is called its circumference.
The Boundary Waters is the largest wilderness area east of the Rocky Mountains. It spans more than 1 million acres along the U.S.-Canada border and is filled with forests, glacial lakes and streams.
Two geofences defined in a GPS application. A geofence is a virtual "perimeter" or "fence" around a given geographic feature. [1] A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries).
Personal boundaries or the act of setting boundaries is a life skill that has been popularized by self help authors and support groups since the mid-1980s. Personal boundaries are established by changing one's own response to interpersonal situations, rather than expecting other people to change their behaviors to comply with your boundary. [1]