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Warianty tytułu
Języki publikacji
Abstrakty
In this paper, by defining a pair of classical sets as a relative set, an extension of the classical set algebra which is a counterpart of Belnap's four-valued logic is achieved. Every relative set partitions all objects into four distinct regions corresponding to four truth-values of Belnap's logic. Like truth-values of Belnap's logic, relative sets have two orderings; one is an order of inclusion and the other is an order of knowledge or information. By defining a rough set as a pair of definable sets, an integrated approach to relative sets and rough sets is obtained. With this definition, we are able to define an approximation of a rough set in an approximation space, and so we can obtain sequential approximations of a set, which is a good model of communication among agents.
Rocznik
Tom
Strony
637--653
Opis fizyczny
Bibliogr. 21 poz., rys.
Twórcy
autor
autor
- Department of Electrical and Computer Engineering University of Tehran P.O. Box 14395/515, Tehran, Iran, amin_mousavi@yahoo.com
Bibliografia
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ1-0012-0029