Set theory

2. (∅) Denotes the set with no elements.
4. (∈) Indicates that an element belongs to a particular set.
6. (⊇) Signifies that one set is a superset of or equal to another set.
7. (=) Both set have the same members.
9. (⊆)Signifies that one set is a subset of or equal to another set.
12. (a, b) Represents a pair of elements, where ‘a’ is the first element and ‘b’ is the second element.
13. (∆)Objects that belongs to A or B but not their intersection.
15. (∉) Indicates that an element does not belong to a particular set.

1. (A^c) Represents the set of all elements that are not in a given set.
3. (⊃)Indicates that one set is a superset of another set but not equal to it.
5. (∪)Represents the set containing all elements that are in at least one of the two sets.
8. (⊂) Indicates that one set is a subset of another set but not equal to it.
10. ( | ) Represents the number of elements in a set.
11. (×)Denotes the two sets, typically written as A × B. It represents the set of all possible ordered pairs where the first element is from set A and the second element is from set B.
14. (∩)Represents the set containing all elements that are in both of the two sets.