Practice Part A: Symmetric, Anti-symmetric And Reflexive Relations (21.5.1) - Lecture -20
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Part A: Symmetric, Anti-Symmetric and Reflexive Relations

Practice - Part A: Symmetric, Anti-Symmetric and Reflexive Relations

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Provide an example of a symmetric relation.

💡 Hint: Think of relationships where mutual conditions apply.

Question 2 Easy

Define a reflexive relation.

💡 Hint: What condition must always hold true in a reflexive relation?

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 (a
c)
If no elements relate to themselves

💡 Hint: Think about relations that require mutual connections.

Question 2

True or False: An anti-symmetric relation can have (a, b) and (b, a) both present if a does not equal b.

True
False

💡 Hint: Remember the definition of anti-symmetry.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Construct a relation on 4 elements that is symmetric yet not reflexive. Describe your relation.

💡 Hint: What must you include while maintaining symmetry and excluding reflexivity?

Challenge 2 Hard

Prove that any reflexive relation on a set is not anti-symmetric if it includes all pairs.

💡 Hint: Look closely at the definitions and what full inclusion means.

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