## Fuzzy Set Theory—and Its ApplicationsSince its inception, the theory of fuzzy sets has advanced in a variety of ways and in many disciplines. Applications of fuzzy technology can be found in artificial intelligence, computer science, control engineering, decision theory, expert systems, logic, management science, operations research, robotics, and others. Theoretical advances have been made in many directions. The primary goal of Fuzzy Set Theory - and its Applications, Fourth Edition is to provide a textbook for courses in fuzzy set theory, and a book that can be used as an introduction. To balance the character of a textbook with the dynamic nature of this research, many useful references have been added to develop a deeper understanding for the interested reader. Fuzzy Set Theory - and its Applications, Fourth Edition updates the research agenda with chapters on possibility theory, fuzzy logic and approximate reasoning, expert systems, fuzzy control, fuzzy data analysis, decision making and fuzzy set models in operations research. Chapters have been updated and extended exercises are included. |

### From inside the book

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Page xv

Nevertheless, a question that is frequently raised by the skeptics is: Are there, in fact, any significant problem-

Nevertheless, a question that is frequently raised by the skeptics is: Are there, in fact, any significant problem-

**areas**in which the use of the theory of fuzzy sets leads to results that could not be obtained by classical methods? Page xvii

The more than 4,000 publications that exist in the field are widely scattered over many

The more than 4,000 publications that exist in the field are widely scattered over many

**areas**and in many journals. Existing books are edited volumes containing specialized contributions or monographs that focus only on specific**areas**... Page xviii

The first volume contains the basic theory of fuzzy sets and some

The first volume contains the basic theory of fuzzy sets and some

**areas**of application. It is intended to provide extensive coverage of the theoretical and applicational approaches to fuzzy sets. Sophisticated formalisms have not been ... Page xix

It was further developed theoretically and it was applied to new

It was further developed theoretically and it was applied to new

**areas**. A number of very good books have appeared, primarily dedicated to special**areas**such as Possibility Theory [Dubois and Prade 1988a), Fuzzy Control [Sugeno 1985a; ... Page xx

It tries to introduce fuzzy set theory as comprehensively as possible, without delving into very theoretical

It tries to introduce fuzzy set theory as comprehensively as possible, without delving into very theoretical

**areas**or presenting any mathematical proofs which do not contribute to a better understanding. It rather offers numerical ...### What people are saying - Write a review

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### Contents

9 | |

11 | |

16 | |

22 | |

29 | |

Criteria for Selecting Appropriate Aggregation Operators | 43 |

The Extension Principle and Applications | 54 |

Special Extended Operations | 61 |

Applicationoriented Modeling of Uncertainty | 111 |

Linguistic Variables | 140 |

Fuzzy Data Bases and Queries | 265 |

Decision Making in Fuzzy Environments | 329 |

Applications of Fuzzy Sets in Engineering and Management | 371 |

Empirical Research in Fuzzy Set Theory | 443 |

Future Perspectives | 477 |

181 | 485 |

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### Common terms and phrases

aggregation algorithm analysis applications approach appropriate approximately areas assignment assume base called chapter classical clustering compute concepts considered constraints contains corresponding crisp criteria customers decision defined definition degree of membership depends described determine discussed distribution domain elements engineering example exist expert systems expressed extension Figure fuzzy control fuzzy numbers fuzzy set theory given goal human important indicate inference input instance integral interpreted intersection interval knowledge linguistic variable logic mathematical mean measure membership function methods normally objective objective function observed obtain operators optimal positive possible probability problem programming properties provides reasoning relation representing require respect rules scale shown shows similarity situation solution space specific statement structure suggested t-norms Table tion true truth uncertainty values Zadeh