SYMBOLS USED IN SETS | SETS
👍 Set Symbols A set is a collection of things, usually numbers. We can list each element (or "member") of a set inside curly brackets like this: Common Symbols Used in Set Theory Symbols save time and space when writing. Here are the most common set symbols In the examples C = {1, 2, 3, 4} and D = {3, 4, 5} Symbol Meaning Example { } SET: a collection of elements {1, 2, 3, 4} A ∪ B UNION: in A or B (or both) C ∪ D = {1, 2, 3, 4, 5} A ∩ B INTERSECTION: in both A and B C ∩ D = {3, 4} A ⊆ B Subset: every element of A is in B. {3, 4, 5} ⊆ D A ⊂ B Proper Subset: every element of A is in B, but B has more elements. {3, 5} ⊂ D A ⊄ B Not a Subset: A is not a subset of B {1, 6} ⊄ C A ⊇ B Superset: A has same elements as B, or more {1, 2, 3} ⊇ {1, 2, 3} A ⊃ B Proper Superset: A has B's elements and more {1, 2, 3, 4} ⊃ {1, 2, 3} A ⊅ B Not a Superset: A is not a superset of B {1, 2, 6} ⊅ {1, 9} A c COMPLIMENT: elemen
