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arXiv · 2508.02044

Graph Unlearning via Embedding Reconstruction -- A Range-Null Space Decomposition Approach

Hang Yin·Zipeng Liu·Xiaoyong Peng·Liyao Xiang
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Abstract

Graph unlearning is tailored for GNNs to handle widespread and various graph structure unlearning requests, which remain largely unexplored. The GIF (graph influence function) achieves validity under partial edge unlearning, but faces challenges in dealing with more disturbing node unlearning. To avoid the overhead of retraining and realize the model utility of unlearning, we proposed a novel node unlearning method to reverse the process of aggregation in GNN by embedding reconstruction and to adopt Range-Null Space Decomposition for the nodes' interaction learning. Experimental results on multiple representative datasets demonstrate the SOTA performance of our proposed approach.

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Hang Yin, Zipeng Liu, Xiaoyong Peng, Liyao Xiang. 2025-08-04. Graph Unlearning via Embedding Reconstruction -- A Range-Null Space Decomposition Approach. https://arxiv.org/abs/2508.02044

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