Theory of graph neural networks: representation and learning
Stefanie Jegelka
Department of EECS, MIT, Cambridge, USA
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Abstract
Graph Neural Networks (GNNs), neural network architectures targeted to learning representations of graphs, have become a popular learning model for prediction tasks on nodes, graphs and configurations of points, with wide success in practice. This article summarizes a selection of emerging theoretical results on approximation and learning properties of widely used message passing GNNs and higher-order GNNs, focusing on representation, generalization, and extrapolation. Along the way, it summarizes broad mathematical connections.