Unfair Generalization in Graph Neural Networks (GNNs)

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22 Oct 2024

Authors:

(1) Junwei Su, Department of Computer Science, the University of Hong Kong and jwsu@cs.hku.hk;

(2) Chuan Wu, Department of Computer Science, the University of Hong Kong and cwu@cs.hku.hk.

Abstract and 1 Introduction

2 Related Work

3 Framework

4 Main Results

5 A Case Study on Shortest-Path Distance

6 Conclusion and Discussion, and References

7 Proof of Theorem 1

8 Proof of Theorem 2

9 Procedure for Solving Eq. (6)

10 Additional Experiments Details and Results

11 Other Potential Applications

8 Proof of Theorem 2

Before diving into the detailed proof, we present an outline of the structure of the proof and prove a lemma which we use in the proof of the theorem. Outline of the proof for the thereom

1. Suppose we are given Vi and Vj , two test groups which satisfy the premise of the theorem;

2. Then, we can approximate and bound the loss of each vertex in these groups based on the nearest vertex in the training set by extending the result from Theorem 1;

3. If we can show that there exists a constant independent of the property of each test group, then we obtain the results of Theorem 2.

This paper is available on arxiv under CC BY 4.0 DEED license.