Set Theory

2. refers to the number of elements in a set.
3. a set is the set of all possible subsets, including the empty set and the set itself.
6. means that one set does not contain all the elements of another set.
8. means that one set does not contain all the elements of another set.
9. is a set that contains all the elements of another set, plus potentially more.
11. is a member or a component that belongs to a set.
13. two sets is the set that contains all the elements from both sets, without repetition.
14. two sets is the set containing all the elements that are common to both sets.
15. is a set where all of its elements are also present in another set.

1. is the set that contains all possible elements relevant to a given context or discussion.
4. two sets is the set of elements that are in either one set or the other, but not in both.
5. a set is the set of all elements that are not in the original set, but are within a specific universe or reference set.
7. in mathematics, means that two things are exactly the same.
10. in mathematics is a collection of distinct objects, often called elements.
12. means that a specific object or item does not belong to a particular set.