| A | B |
|---|
| set | a collection of object whose contents can be determined |
| elements | objects in a set |
| roster method | uses lists inside brackets |
| set builder notation | {x|x < 2 |
| null set | empty set { } has no elements |
| natural numbers | the set of counting numbers |
| whole numbers | the set of counting numbers plus zero |
| integers | the set of positive and negative whole numbers |
| cardinal number of a set | the number of elements in a set |
| finite set | have a countable number of elements |
| infinite set | uncountable number of set elements |
| universal set | symbolized by U, contains all the elements in a problem |
| Venn diagrams | diagram that allows for visual analysis |
| complement | all the elements in the universal set not in A |
| subset | if every element in A is also in B |
