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Wiktionary
discrete set

n. (context topology English) A set of points of a topological space such that each point in the set is an isolated point, i.e. a point that has a neighborhood that contains no other points of the set.

Usage examples of "discrete set".

Indeed, a sexually reproducing species can be thought of as a device that permutes a discrete set of mutually accustomed genes in different combinations.

Each phoneme is created by a certain discrete set of physiological actions.