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What is: LightGCN?

SourceLightGCN: Simplifying and Powering Graph Convolution Network for Recommendation
Year2000
Data SourceCC BY-SA - https://paperswithcode.com

LightGCN is a type of graph convolutional neural network (GCN), including only the most essential component in GCN (neighborhood aggregation) for collaborative filtering. Specifically, LightGCN learns user and item embeddings by linearly propagating them on the user-item interaction graph, and uses the weighted sum of the embeddings learned at all layers as the final embedding.