Chapter One: Uncertain theories

Abstract

As real-life decisions are usually made under uncertain situations, a motivation for researchers is to study the behavior of uncertain phenomena. Therefore, many theories have been proposed to handle uncertainty such as fuzzy set theory and uncertain theory. This chapter briefly reviews the basic concepts of fuzzy set theory and belief degree-based uncertainty. The presented concepts of this chapter later will be used to focus on uncertain data envelopment analysis models.

Keywords

Fuzzy set theory; Uncertain theory; Belief degree; Data envelopment analysis

1.1: Introduction

In this section, some information about the book such as its importance, motivation, structure, etc., will be discussed. ...

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