Finite and Infinite Sets

Let’s compare the differences between the Finite and Infinite sets in the following table:

Finite Set

Infinite Set

Finite sets are countable. Infinite sets can be countable or uncountable.
A subset of a finite set will always be finite. A subset of an infinite set may be finite or infinite.
The power set of a finite set will always be finite. The power set of an infinite set is infinite.
The union of two finite sets is finite. The union of two infinite sets is infinite.

Example: 

  • Set of odd natural numbers less than 50, 
  • Set of names of days in a week

Example: 

  • Set of points on a line,
  • Set of Real numbers, etc.

Also, Read

Finite Sets

Finite set is a collection of finite, well-defined elements. For better understanding, imagine you have a bunch of your favourite toys or snacks. You know exactly how many you have, that’s the idea of a finite set in math. A finite set is a way to discuss collections of things you can count. In this article, we will discuss the concept of finite sets and their properties. We will also understand the difference between finite sets and infinite sets with the help of examples for a better understanding.

Table of Content

  • What is Finite Set?
  • Example of Finite Set
  • Cardinality of Finite Set
  • Properties of Finite Sets
  • Finite and Infinite Sets

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What is Finite Set?

Finite sets are sets with a finite or countable number of elements. These sets are also known as countable sets because their elements can be counted. The process of counting elements comes to an end in a finite set. The set consists of an element from the beginning and an element from the end. Finite sets are easily represented in roster notation. An example of a finite set is the set of vowels in the English alphabet, Set A = [a, e, i, o, u], which has a finite number of elements....

Example of Finite Set

There are various examples of finite sets, some of those examples are as follows:...

Cardinality of Finite Set

The number of elements in a finite set is known as the cardinality of that set. It represents the size or count of elements within the set. The cardinality of any finite set A is represented by the symbol n(A)....

Properties of Finite Sets

The following finite set conditions are always finite....

Finite and Infinite Sets

Let’s compare the differences between the Finite and Infinite sets in the following table:...

Solved Problems on Finite Sets

Problem 1: Let A = {1, 2, 3, 4} and B = {3, 4, 5, 6} be finite sets. Find the union and intersection of sets A and B....

Practice Problems on Finite Sets

Problem 1: Let A = {2, 4, 6, 8} and B = {4, 6, 8, 10}. Find:...

FAQs on Finite Sets

What is Finite Set in Set Theory?...