Set operators

  • The set operators:

    • ∪ = set union
    • ∩ = set intersection
    • − = set difference
    • × = cartesian product

    They were taught in high school and you should know them already

  • Note:  

    • The result of union (∪), intersection (∩) and set difference (−) operations is also a set !!!

      Example: 

         {1, 2, 3} ∩ {3, 4, 5} = {3} //

      A set do not have duplicate elements !