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Title: The core of scientific subjects : an exact definition using concetration theory and fuzzy set theory.
Authors: EGGHE, Leo 
Issue Date: 2001
Source: Davis, M & Wilson, C.S. (Ed.) Proceedings of the 8th International Conference on Scientometrics and Informetrics: vol. 1. p. 147-156.
Abstract: Determining the core of a field's literature. i.e. its 'most important' sources, has been and still is an important problem in bibliomehics. In this article an exact definition of a core of a bibliography or a conglomerate is presented. The main ingredients for this definition are: fuzzy set theory, Lorenz curves and concentration measures. If one prefers a strict delineation, the fuzzy core can easily be defuzzified. The method we propose does not depend on the subjective notion of 'importance'. It is, moreover, completely reproducible. The method and the resulting core is also independent of the mathematical function (Lotka, Zipf, Bradford, etc.) that may be used to describe the relation between the set of sources and that of items.
Keywords: Core; concentration theory; fuzzy set theory
Document URI:
ISI #: 000175222300021
Category: C1
Type: Proceedings Paper
Validations: ecoom 2003
Appears in Collections:Research publications

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