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arXiv · 2605.12009

Estimating Subgraph Importance with Structural Prior Domain Knowledge

Changhyun Kim·Seunghwan An·Jong-June Jeon
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Abstract

We propose a subgraph importance estimation method for pretrained Graph Neural Networks (GNNs) on graph-level tasks, formulated as a linear Group Lasso regression problem in the embedding space. Our method effectively leverages prior domain knowledge of graph substructures, while remaining independent of the specific form of the output layer or readout function used in the GNN architecture, and it does not require access to ground-truth target labels. Experiments on real-world graph datasets demonstrate that our method consistently outperforms existing baselines in subgraph importance estimation. Furthermore, we extend our method to identify important nodes within the graph.

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Changhyun Kim, Seunghwan An, Jong-June Jeon. 2026-05-12. Estimating Subgraph Importance with Structural Prior Domain Knowledge. https://arxiv.org/abs/2605.12009

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