Glossary math Term Page

Subset

A relation where all elements of one set are contained in another

subset #math#set-theory

Korean version

Aliases

subset

Prerequisites

Mathematical set

Related Concepts

Mathematical set Empty set Power set

Core Idea

A subset is a containment relation: if every element of $A$ is also in $B$ , then $A \subseteq B$ . This idea is the basis for set equality, power sets, and many logical definitions.

Role In This Blog

In Mathbong, subset is one of the first precise definitions learners use to move from intuition to formal mathematical language.

Posts Mentioning This Concept

[Set Theory Series 1] What Is Set Theory, and Why Study It? An introduction to why set theory serves as a common language of mathematics and how this series builds the core ideas step by step.[집합론 시리즈 1편] 집합론은 무엇이고 왜 배우는가 집합론이 수학의 공통 언어로 쓰이는 이유와 이 시리즈에서 다룰 핵심 흐름을 소개합니다.[Set Theory Series 3] Subsets and Set Equality Understand what a subset means, how proper subsets differ, and what it really means for two sets to be equal.