In mathematics, a limit point of a set S in a topological space X is a point x that can be approximated by points of S in the sense that every neighbourhood of x with respect to the topology on X also contains a point of S other than x itself. Note that x does not have to be an element of S. This concept profitably generalizes the notion of a limit and is the underpinning of concepts such as closed set and topological closure. Indeed, a set is closed if and only if it contains all of its limit points, and the topological closure operation can be thought of as an operation that enriches a set by adding its limit points.
Upright
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In an erect position or posture; perpendicular; vertical,
or nearly vertical; pointing upward; as, an upright tree.
Upright meaning & definition 1 of Upright.
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to be [awake], out of [bed], or [standing up].
Upright meaning & definition 2 of Upright.
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(of a person) sitting or standing with the back straight.
Upright meaning & definition 3 of Upright.
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Someone who is [looking good].
[Somone] who is [true] to him or herself
Upright meaning & definition 4 of Upright.
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This refers to [an act] of oral sex being performed on a man as he stands, while [the woman] doing the [favor] is kneeling before him...an upright (blowjob).
Upright meaning & definition 5 of Upright.
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Upright in Show Jumping. An obstacle with the elements placed one above the other in the same vertical plane.
Upright meaning & definition 6 of Upright.
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Type of Bicycle ridden by balancing on a small, hard piece of rubber known as a saddle. This type of bicycle causes several problems which include the following:
Wrist pain
[Shoulder pain]
Neck pain
Back pain
[Saddle sores]
The above problems are not present on a recumbent bicycle.Also known as a Diamond-Frame (DF) bicycle, a UCI bike, an [Upwrong] or a wedgie bike.
Upright meaning & definition 7 of Upright.