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HomeHomework HelpmathematicsSet Theory Basics

Set Theory Basics

The fundamental concepts and principles of set theory, including the definition of a set, types of sets such as null, singleton, finite, and infinite sets, and set operations like union, intersection, and complement

beginner
2 hours
Mathematics
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Overview

Set theory is a fundamental area of mathematics that deals with the study of sets, which are collections of objects. It provides essential tools for understanding relationships between different groups of items, making it a cornerstone for various mathematical concepts. By learning about sets, eleme...

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Key Terms

Set
A collection of distinct objects, considered as an object in its own right.

Example: A set of natural numbers: {1, 2, 3, 4}

Element
An individual object within a set.

Example: In the set {a, b, c}, 'a' is an element.

Union
The set containing all elements from both sets.

Example: A ∪ B = {1, 2} ∪ {2, 3} = {1, 2, 3}

Intersection
The set containing only the elements common to both sets.

Example: A ∩ B = {1, 2} ∩ {2, 3} = {2}

Venn Diagram
A diagram that shows all possible logical relations between a finite collection of sets.

Example: A Venn diagram can illustrate the union and intersection of two sets.

Subset
A set that is entirely contained within another set.

Example: If A = {1, 2}, then A is a subset of B = {1, 2, 3}.

Related Topics

Logic
The study of reasoning and argumentation, closely related to set theory.
intermediate
Probability
The study of uncertainty and chance, often using set theory concepts.
intermediate
Functions
A relation between sets that associates each element of one set with exactly one element of another set.
advanced

Key Concepts

SetsElementsUnionIntersection