Practice Case 1: K-sized Subset With More Neighbours (26.1.2.2.1) - Proof of Hall's Marriage Theorem
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Case 1: k-sized Subset with More Neighbours

Practice - Case 1: k-sized Subset with More Neighbours

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is a bipartite graph?

💡 Hint: Think about how the vertices are connected.

Question 2 Easy

Define a complete matching.

💡 Hint: Consider what it means to cover all vertices in one set.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does Hall's Marriage Theorem state?

A matching exists if |N(A)| = |A|
A matching exists if |N(A)| ≥ |A| for any A
A matching exists if all vertices are interconnected

💡 Hint: Consider what it means for subsets and their neighbours.

Question 2

True or False: If |N(A)| < |A| for any subset A, a complete matching can exist.

True
False

💡 Hint: Think about how many vertices need to be matched.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Prove Hall’s Marriage Theorem using a specific bipartite graph example and calculating neighbours.

💡 Hint: Draw the bipartite graph and label neighbours.

Challenge 2 Hard

Construct different bipartite graphs, varying the connections, and identify which meet or violate Hall’s conditions.

💡 Hint: Compare neighbour counts with set sizes.

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