Journal
INFORMATION SCIENCES
Volume 185, Issue 1, Pages 249-264Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2011.09.029
Keywords
Grey sets; Fuzzy sets; Rough sets
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This paper discusses the application of grey numbers for uncertainty representation. It highlights the difference between grey sets and interval-valued fuzzy sets, and investigates the degree of greyness for grey sets. It facilitates the representation of uncertainty not only for elements of a set, but also the set itself as a whole. Our results show that a grey set could be specified for interval-valued fuzzy sets or rough sets under special conditions. With the notion of grey sets and their associated degrees of greyness, various set operations between grey sets are discussed. (C) 2011 Elsevier Inc. All rights reserved.
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