[r/ML] [R] VLouvain: Louvain Community Detection Directly on Vectors, No Graph Construction

Summary

VLouvain introduces a novel method for community detection that operates directly on vector embeddings, eliminating the need for explicit graph construction. This innovation resolves the scalability bottleneck of traditional Louvain, which struggles with O(n^2) edges on large datasets. By computing degrees and modularity gains from community-level vector sums, VLouvain enables efficient community detection for applications like GraphRAG and recommender systems on previously unmanageable scales.

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