1: Set Theory Last updated Save as PDF Page ID 19027 Elias Zakon University of Windsor via The Trilla Group (support by Saylor Foundation) 1.1: Sets and Operations on Sets. Quantifiers 1.1.E: Problems in Set Theory (Exercises) 1.2: Relations. Mappings 1.2.E: Problems on Relations and Mappings (Exercises) 1.3: Sequences 1.4: Some Theorems on Countable Sets 1.4.E: Problems on Countable and Uncountable Sets (Exercises)