Symbol Symbol Name Meaning / definition Example { } set a collection of elements A = {3,7,9,14}, B = {9,14,28} A ∩ B intersection objects that belong to set A and set B A ∩ B = {9,14} A ∪ B union objects that belong to set A or set B A ∪ B = {3,7,9,14,28} A ⊆ B subset A is a subset of B. set A is included in set B. {9,14,28} ⊆ {9,14,28} A ⊂ B proper subset / strict subset A is a subset of B, but A is not equal to B. {9,14} ⊂ {9,14,28} A ⊄ B not subset set A is not a subset of set B {9,66} ⊄ {9,14,28} A ⊇ B superset A is a superset of B. set A includes set B {9,14,28} ⊇ {9,14,28} A ⊃ B proper superset / strict superset A is a superset of B, but B is not equal to A. {9,14,28} ⊃ {9,14} A ⊅ B not superset set A is not a superset of set B {9,14,28} ⊅ {9,66} 2 A power set all subsets of A power set all subsets of A A = B equality both sets have the same members A={3,9,14}, B={3,9,14}, A=B A c complement all the objects that do not belong to set A A \ B relative ...
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