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.
Surcharge
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Occurs when a man is engaging in sexual intercourse with more than one female partner simultaneously. During intercourse, anal penetration may take place. After the male genitalia has fully penetrated the females anal cavity, the woman will place the penis back into her mouth This is commonly referred to as Ass to Mouth ([ATM]). A surcharge occurs if the woman placing the post-anal activity penis in her mouth is a partner other than the original recipient of [anal] sex. The name originates in the common practice of financial institutions charging an additional fee or surcharge for making a withdrawal from a third-party ATM.
Surcharge meaning & definition 1 of Surcharge.
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a charge in addition to the usual amount paid for something, or the amount already paid:
Surcharge meaning & definition 2 of Surcharge.
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An additional charge or payment.
Surcharge meaning & definition 3 of Surcharge.