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Set theory
Term | Definition |
---|---|
Set | A collection or group of objects. |
element | An object that belongs to a set. Sometimes the word "member" is used. |
complement of a set | The elements in the universe that are not in the set. |
disjoint sets | Sets that have no common elements. |
empty set | A set that has no elements. It is sometimes called the null set. |
finite set | Any set whose elements can be counted. |
infinite set | Any set whose elements cannot be counted. |
subset | A set that contains only elements found in another set. |
proper subset | A subset that does not contain every element in another set. |