The Euclidean Sinkhole: Why Local Dense Vector RAG Fails at Personal Knowledge SensemakingAn empirical breakdown of context fragmentation, multi-hop blindness, and global synthesis bottlenecks in flat FAISS/L2 spaces—and why personal vaults demand graph topologies.8 min read·junsukim.hashnode.devJul 6
Spectral Graph Embeddings & Bipartite Bridging: Controlling Data Sparsity Without LLM Semantic DriftWhy linear-algebraic matrix factorization is identical to graph representation learning, and how to bridge Out-of-Vocabulary (OOV) terms in specialized domains without destroying personal subjectivity.6 min read·junsukim.hashnode.devJul 6
