Feedback in Information Retrieval and Search for Clusters

Theory of information retrieval through fuzzy thesauri is developed in Chapter 5 and clustering of documents is discussed in Chapter 6. A link between these two concepts is retrieval of clusters, which is closely related to feedback in information retrieval. In Chapter 3 we have reviewed a diagrammatic representation by Heaps (1978) and suggested that fuzzy retrieval will improve his approach. Using the max-min algebra instead of ordinary algebra for matrix calculation in the diagrams, we will find that a feedback system of information retrieval is equivalent to cluster retrieval using the single linkage method (Miyamoto, 1989).