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derived set[də′rīvd ′set]
The set of cluster points of a given set.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
the set of all limit points of a given set. The derived set is obtained by subtracting all the isolated points of the set from the closure of the set. A derived set is always closed.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.