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(topology) 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.

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discrete set

In the subspace topology, every point of the discrete set has an open neighborhood that contains no other points of the set.

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In the subspace topology, every point of the discrete set has an open neighborhood that contains no other points of the set.

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