outer measure
(redirected from Carathéodory theorem (measure theory))outer measure
[′au̇d·ər ′mezh·ər] (mathematics)
A function with the same properties as a measure except that it is only countably subadditive rather than countably additive; usually defined on the collection of all subsets of a given set.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.