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Reversible and irreversible bracket-based dynamics for deep graph neural networks

2023/05/24 by Anthony Gruber, Kookjin Lee, Gruber, Anthony +3 · 7 citations
Engineering · Physics and Astronomy · #FOS: Computer and information sciences #Lattice Boltzmann Simulation Studies #Machine Learning (cs.LG) #Model Reduction and Neural Networks #Quantum many-body systems

paper · pdf · doi:10.48550/arxiv.2305.15616

openalex publication_date 2023/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

Recent works have shown that physics-inspired architectures allow the training of deep graph neural networks (GNNs) without oversmoothing. The role of these physics is unclear, however, with successful examples of both reversible (e.g., Hamiltonian) and irreversible (e.g., diffusion) phenomena producing comparable results despite diametrically opposed mechanisms, and further complications arising due to empirical departures from mathematical theory. This work presents a series of novel GNN architectures based upon structure-preserving bracket-based dynamical systems, which are provably guaranteed to either conserve energy or generate positive dissipation with increasing depth. It is shown that the theoretically principled framework employed here allows for inherently explainable constructions, which contextualize departures from theory in current architectures and better elucidate the roles of reversibility and irreversibility in network performance.

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