Euclidean is Not Enough! AC group member Bo Xiong organizes a hyperbolic graph neural network tutorial at KDD 2023

18. Juli 2023

Bo Xiong, a PhD student in Analytic Computing group, together with researchers from Huawei Technologies, Chinese University of Hong Kong (CUHK) and Hong Kong University of Science and Technology (HKUST, Guanzhou), will co-organize a tutorial in the topic of hyperbolic graph neural network in KDD 2023, a premier international conference for data mining. 
Graph neural networks (GNNs) generalize conventional neural networks to graph-structured data and have received considerable attention owing to their impressive performance. In spite of the notable successes, the performance of Euclidean models is inherently bounded and limited by the representation ability of Euclidean geometry, especially when it comes to datasets with highly non-Euclidean latent anatomy. Recently, hyperbolic spaces have emerged as a promising alternative for processing graph data with tree-like structure or power-law distribution and a surge of works on either methods or novel applications have been seen. Unlike Euclidean space, which expands polynomially, hyperbolic space grows exponentially with its radius, making it more suitable for modeling complex real-world data. Hence, it gains natural advantages in abstracting tree-like graphs with a hierarchical organization or power-law distribution. 
This tutorial aims to give a systematical review of the methods, applications, and challenges in this fast-growing and vibrant area, with the express purpose of being accessible to all audiences. More specifically, we will first give a brief introduction to graph neural networks as well as some preliminary of Riemannian manifold and hyperbolic geometry. We then will comprehensively revisit the technical details of the developed HGNNs, by unifying them into a general framework and summarizing the variants of each component. Besides, we will introduce applications deployed in a variety of fields. Finally, we will discuss several challenges and present the potential solutions to address them, including some initial attempts of our own, which potentially paves the path for the further flourishing of the research community.
The full agenda and presenters of the tutorial are in
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