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Abstract
Graph Neural Networks (GNNs) have gained significant popularity for learning
representations of graph-structured data due to their expressive power and
scalability. However, despite their success in domains such as social network
analysis, recommendation systems, and bioinformatics, GNNs often face
challenges related to stability, generalization, and robustness to noise and
adversarial attacks. Regularization techniques have shown promise in addressing
these challenges by controlling model complexity and improving robustness.
Building on recent advancements in contractive GNN architectures, this paper
presents a novel method for inducing contractive behavior in any GNN through
SVD regularization. By deriving a sufficient condition for contractiveness in
the update step and applying constraints on network parameters, we demonstrate
the impact of SVD regularization on the Lipschitz constant of GNNs. Our
findings highlight the role of SVD regularization in enhancing the stability
and generalization of GNNs, contributing to the development of more robust
graph-based learning algorithms dynamics.