Beyond Soft Masks: Hard-Perturbation Mixup Explainer for Robust GNN Explainability
Published in arXiv preprint, 2026
HPME uses graph pooling to select discrete explanatory subgraphs, suppressing irrelevant structure that can remain under soft masks. A structure-replacement mixup strategy helps keep the resulting explanations in distribution.
Recommended citation: Jialiang Yin, Zheng Zhao, Linsey Pang, Bo Dong, Bin Shi, Jiaxing Zhang. 2026. Beyond Soft Masks: Hard-Perturbation Mixup Explainer for Robust GNN Explainability. arXiv:2606.05756.
Recommended citation: Jialiang Yin, Zheng Zhao, Linsey Pang, Bo Dong, Bin Shi, Jiaxing Zhang. 2026. Beyond Soft Masks: Hard-Perturbation Mixup Explainer for Robust GNN Explainability. arXiv:2606.05756. https://arxiv.org/abs/2606.05756