elements or members of the set. A set is said to contain its *elements*. We write $a \in A$ to denote that a is an element of the set **A**. The notation $a \in A ...

Abstract: This book was inspired by course B3 (Introduction to Discrete Structures) of the ACM Curriculum 68. Five major topics are treated: sets and relations; graphs; algebraic structures; lattices; ...

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