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Author

Sandeep Silwal

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#machine learning Preprint Oct 2026

Random Fourier Features in Near-Linear Time

Random Fourier features approximate a shift-invariant kernel in $\mathbb{R}^d$, such as the Gaussian kernel $\exp(-\tfrac12\|x-y\|_2^2)$, using independent samples from its spectral measure to construct an unbiased estimator for the kernel value with subgaussian concentration. However, generating $m$ such features requ...

S. Mahabadi, Sandeep Silwal, Tal Wagner · 0 citations
#artificial intelligence Preprint Sep 2026

Better Nearest Neighbor Graph Indices via (Efficient) LLM-Guided Pruning

LLM-Guided Graph Pruning (LGP), a general framework that addresses this mismatch directly by leveraging LLM reasoning to refine an existing ANN graph index itself, and consistently improves end-to-end retrieval performance over both vanilla greedy graph search and LLM-based reranking across widely used graph-based ANN...

Fangzhou Wu, Hai-Ke Xu, Sandeep Silwal · 0 citations

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