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isolated∗ djao† 2013-03-21 13:03:12 Let X be a topological space, let S ⊂ X, and let x ∈ S. The point x is said to be an isolated point of S if there exists an open set U ⊂ X such that U ∩ S = {x}. The set S is isolated or discrete if every point in S is an isolated point. ∗ hIsolatedi created: h2013-03-21i by: hdjaoi version: h31201i Privacy setting: h1i hDefinitioni h54A05i † This text is available under the Creative Commons Attribution/Share-Alike License 3.0. You can reuse this document or portions thereof only if you do so under terms that are compatible with the CC-BY-SA license. 1