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.
Pre-text
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The nonchalant text u send immediately before you send an important [text] to a person. The pre-text insures that you will know whether or not the person will reply so that you are not left with [textpectation] after sending the important [text] it insures that your important query will not be [textnore]d. Sort of like signing for a UPS package so they know that you got it.
Pre-text meaning & definition 1 of Pre-text.
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