Abstract
Rough set, initialized by Pawlak [109], has been proved to be an excellent mathematical tool dealing with vague description of objects. A fundamental assumption is that any object from a universe is perceived through available information, and such information may not be sufficient to characterize the object exactly. One way is the approximation of a set by other sets. Thus a rough set may be defined by a pair of crisp sets, called the lower and the upper approximations, that are originally produced by an equivalence relation.
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© 2004 Springer-Verlag Berlin Heidelberg
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Liu, B. (2004). Trust Theory. In: Uncertainty Theory. Studies in Fuzziness and Soft Computing, vol 154. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39987-2_4
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DOI: https://doi.org/10.1007/978-3-540-39987-2_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-13262-3
Online ISBN: 978-3-540-39987-2
eBook Packages: Springer Book Archive