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In commutative algebra, the constructible topology on the spectrum of a commutative ring A is a topology where each closed set has the form with . With respect to this topology, is compact (Hausdorff quasi-compact) and totally disconnected. The constructible topology is finer (having more open sets) than the Zariski topology and coincides with it if and only if is von Neumann regular. The most important feature of this construction is that is closed with respect to the constructible topology. See also Constructible set (topology) References Atiyah, Michael Francis; Macdonald, I.G. (1969), Introduction to Commutative Algebra, Westview Press, p. 50, ISBN 978-0-201-40751-8  This mathematics-related article is a stub. You can help Wikipedia by expanding it.v · d · e