Union
21-01-26–21-06-12
Definition
The union of a collection of sets is the set of all elements in that collection.
Notation
The union of sets \(A\) and \(B\) is denoted by
\[ A \cup B = \{x \mid x \in A\ \text{or}\ x \in B \} \]
The union of a collection of sets is the set of all elements in that collection.
The union of sets \(A\) and \(B\) is denoted by
\[ A \cup B = \{x \mid x \in A\ \text{or}\ x \in B \} \]