A regular set is a set with finite subsets. A finite subset of a regular set is a finite set, and a finite subset of a non-regular set is a non-regular set.
For example, the set of natural numbers is a proper subset of the set of rational numbers. Another example of a regular set is the set of points on a line segment. The sets are both indefinite, although the latter has a much larger cardinality.
A proper subset of a regular set is a set that contains all elements of a regular set, but it contains at least one element that is not in the regular set. It can be a subset of another set, or it can be empty. The empty set is also a subset of a regular set.
A proper subset of a regular set has at least one element in common with all other subsets. For example, a proper subset of a regular set has two elements. For every element in a regular set, there are two proper subsets of that subset: a, and b.
In math, a subset is a group of elements or objects. For example, set A is a set of integers, while set B is a set of odd numbers. A subset of A is a subset of B, and the other way around is a superset of B. A proper subset of a regular set can be an equal or unequal set.
A powerset is the set of all subsets of a regular set. For example, S = a, b, and c. A powerset of S is A(S) or AE (A, B, or c). A powerset is a subset of S, and every subset of S is a subset of S. The higher the number of elements in a set, the more subsets it contains.