2.1 Crisp Sets: A Review2.1.1 Basic Concepts2.1.2 Operations on Sets2.1.3 Properties of Sets2.2 Fuzzy Sets2.2.1 Fuzziness/Vagueness/Inexactness2.2.2 Set Membership2.2.3 Fuzzy Sets2.2.4 Fuzzyness vs. Probability2.2.5 Features of Fuzzy Sets2.3 Fuzzy Membership Functions2.3.1 Some Popular Fuzzy Membership Functions2.3.2 Transformations2.3.3 Linguistic Variables2.4 Operations on Fuzzy Sets2.5 Fuzzy Relations2.5.1 Crisp Relations2.5.2 Fuzzy Relations2.5.3 Operations on Fuzzy Relations2.6 Fuzzy Extension Principle2.6.1 Preliminaries2.6.2 The Extension PrincipleChapter SummarySolved ProblemsTest Your KnowledgeAnswersExercisesBibliography and Historical Notes