# Graph neural network

A graph neural network (GNN) is a class of neural networks for processing data represented by graph data structures. They were popularized by their use in supervised learning on properties of various molecules. Since their inception, several variants of the simple message passing neural network (MPNN) framework have been proposed. These models optimize GNNs for use on larger graphs and apply them to domains such as social networks, citation networks, and online communities. It has been mathematically proven that GNNs are a weak form of the Weisfeiler–Lehman graph isomorphism test, so any GNN model is at least as powerful as this test. There is now growing interest in uniting GNNs with other so-called "geometric deep learning models" to better understand how and why these models work.

##### Relations

e.g. Graph convolutional networks (GCN)

Generalization of neural networks to arbitrary graphs.

Deep learning (also known as deep structured learning) is part of a broader family of machine learnin...

PyTorch Geometric (PyG) is a geometric deep learning extension library for PyTorch. It consists of...

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##### Resources

treated in An Attempt at Demystifying Graph Deep Learning - Essays on Data Science

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There are a ton of great explainers of what graph neural networks are. However, I find that a lot of...

treated in A Comprehensive Survey on Graph Neural Networks

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We propose a new taxonomy to divide the state-of-the-art graph neural networks into four categories,...