Practice Part B: Symmetric, Anti-symmetric And Irreflexive Relations (21.5.2) - Lecture -20
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Part B: Symmetric, Anti-Symmetric and Irreflexive Relations

Practice - Part B: Symmetric, Anti-Symmetric and Irreflexive Relations

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Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Define a symmetric relation in your own words.

💡 Hint: Think about how relationships often work in pairs.

Question 2 Easy

What is an example of an irreflexive relation?

💡 Hint: Consider numerical comparisons where one number can’t equal itself.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What defines a symmetric relation?

If (a
b) implies (b
a)
If (a
b) implies b > a
If (a
b) implies (a
a)

💡 Hint: What would happen if you reversed the pairs in a relationship?

Question 2

True or False: An anti-symmetric relation can have (a, a) and (b, b) without issue.

True
False

💡 Hint: Consider the definition of anti-symmetry carefully.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Given a set A = {a, b, c}, construct all possible relations and categorize them by symmetry, anti-symmetry, and irreflexivity.

💡 Hint: Use the definition of each type to guide your categorization.

Challenge 2 Hard

Prove that a symmetric relation on a set can never be irreflexive.

💡 Hint: Start with the definitions of symmetric and irreflexive relations.

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