A tiered Certify-then-Rectify system for HNSW that certifies approximate results statistically and falls back to exact recovery by treating the graph as a spanner whose stretch is bounded via extreme value theory.
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HNSW with Accuracy Guarantees Using Graph Spanners -- A Technical Report
A tiered Certify-then-Rectify system for HNSW that certifies approximate results statistically and falls back to exact recovery by treating the graph as a spanner whose stretch is bounded via extreme value theory.