This paper is an overview of past and present works dealing with fuzzy numbers and their
operations. A fuzzy number (more generally a fuzzy quantity) is a fuzzy set in the real line …

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This chapter is an overview of past and present works dealing with fuzzy intervals and their
operations. A fuzzy interval is a fuzzy set in the real line whose level-cuts are intervals …

In this paper, we present a Fuzzy Relational Databases model whose main characteristics
are: the integration of previous models in the same framework, representation capabilities …

The purpose of this book is to provide the reader who is interested in applications of fuzzy
set theory, in the first place with a text to which he or she can refer for the basic theoretical …

The client-server model is being used mostly in the actual DataBase Management Systems
(DBMS). However, these DBMS do not allow either to make flexible queries to the database …

This paper introduces a novel representation, called the InfoCrystalTM, that can be used as
a visualization tool as well as a visual query language to help users search for information …

The fuzzy relational model of Buckles and Petry is a rigorous scheme for incorporating non-
ideal or fuzzy information in a relational database. In addition to providing a consistent …

Present geographic database design is based on Boolean logic. The inadequacy of this
logic for representation and manipulation of inexact data has recently become a major topic …

This paper shows the necessary elements for the effective implementation of the
generalized fuzzy relational database model. From the model described in Medina et …