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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/762

Title: A proposal to define a core of a scientific subject: A definition using concentration and fuzzy sets
Authors: EGGHE, Leo
ROUSSEAU, Ronald
Issue Date: 2002
Publisher: KLUWER ACADEMIC PUBL
Citation: Scientometrics, 54(1). p. 51-62
Abstract: Determining the core of a field's literature, i.e. its 'most important' sources, has been and still is an important problem in bibliometrics. 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.
URI: http://hdl.handle.net/1942/762
DOI: 10.1023/A:1015680304126
ISI #: 000175902800003
ISSN: 0138-9130
Category: A1
Type: Journal Contribution
Validation: ecoom, 2003
Appears in Collections: Research publications

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