Set theory is a fundamental area of discrete mathematics that deals with collections of objects, known as sets. A set is an unordered collection of unique objects, known as elements or members. Sets can be finite or infinite, and they can be used to represent a wide range of data structures, including arrays, lists, and trees.
The union of two sets $A$ and $B$, denoted by $A \cup B$, is the set of all elements that are in $A$ or in $B$ or in both. The intersection of two sets $A$ and $B$, denoted by $A \cap B$, is the set of all elements that are in both $A$ and $B$. Set theory is a fundamental area of discrete
A set is a collection of objects, denoted by $S = {a_1, a_2, ..., a_n}$, where $a_i$ are the elements of $S$. The union of two sets $A$ and $B$,