GNN necessity

The chart does more than provide an elegant theoretical framework. They provide a mathematical foundation on which we can analyze, understand, and study complex systems in the real world. In the past 25 years, the number and quality of graphical structure data available to researchers has increased significantly. With the emergence of large-scale social network platforms, a large number of scientific activities have modeled interactive bodies, food webs, databases of molecular graph structures, and the emergence of billions of network-connected devices, meaningful graph data for researchers to analyze. The challenge is to unlock the potential of these data.
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