Host: Japan Society for Fuzzy Theory and Intelligent Informatics
In this paper, we consider correspondence relationship among belief change, rough sets and information retrieval. First, to consider common parts of these three frameworks, we introduce a situation of information retrieval that a user searches information in a given information table by queries until getting necessary information. We discuss that this situation illustrates correspondence as frameworks among belief change, rough sets and information retrieval. Moreover, we also discuss that operations in these frameworks, that is, operations of information retrieval, operations of belief change, and control of the degree of granularity, correspond each other. This indicates the existence of ``cycles" among these operations.
