Search Results for author: Ravishankar Krishnaswamy

Found 5 papers, 1 papers with code

OOD-DiskANN: Efficient and Scalable Graph ANNS for Out-of-Distribution Queries

no code implementations22 Oct 2022 Shikhar Jaiswal, Ravishankar Krishnaswamy, Ankit Garg, Harsha Vardhan Simhadri, Sheshansh Agrawal

State-of-the-art algorithms for Approximate Nearest Neighbor Search (ANNS) such as DiskANN, FAISS-IVF, and HNSW build data dependent indices that offer substantially better accuracy and search efficiency over data-agnostic indices by overfitting to the index data distribution.

FreshDiskANN: A Fast and Accurate Graph-Based ANN Index for Streaming Similarity Search

1 code implementation20 May 2021 Aditi Singh, Suhas Jayaram Subramanya, Ravishankar Krishnaswamy, Harsha Vardhan Simhadri

Approximate nearest neighbor search (ANNS) is a fundamental building block in information retrieval with graph-based indices being the current state-of-the-art and widely used in the industry.

Information Retrieval Retrieval

Learning Mixture of Gaussians with Streaming Data

no code implementations NeurIPS 2017 Aditi Raghunathan, Ravishankar Krishnaswamy, Prateek Jain

However, by using a streaming version of the classical (soft-thresholding-based) EM method that exploits the Gaussian distribution explicitly, we show that for a mixture of two Gaussians the true means can be estimated consistently, with estimation error decreasing at nearly optimal rate, and tending to $0$ for $N\rightarrow \infty$.

Clustering

Relax, no need to round: integrality of clustering formulations

no code implementations18 Aug 2014 Pranjal Awasthi, Afonso S. Bandeira, Moses Charikar, Ravishankar Krishnaswamy, Soledad Villar, Rachel Ward

Under the same distributional model, the $k$-means LP relaxation fails to recover such clusters at separation as large as $\Delta = 4$.

Clustering

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