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Siddharth Gollapudi

4 accepted papers

2025

Improved Approximations for Hard Graph Problems using Predictions

ICML 2025poster

We design improved approximation algorithms for NP-hard graph problems by incorporating predictions (e.g., learned from past data). Our prediction model builds upon and extends the $\varepsilon$-prediction framework by Cohen-Addad, d'Orsi, Gupta, Lee, and Panigrahi (NeurIPS 2024). We consider an ed…

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2025

Learning-Augmented Frequent Directions

ICLR 2025spotlight

An influential paper of Hsu et al. (ICLR'19) introduced the study of learning-augmented streaming algorithms in the context of frequency estimation. A fundamental problem in the streaming literature, the goal of frequency estimation is to approximate the number of occurrences of items appearing in a…

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2025

Sort Before You Prune: Improved Worst-Case Guarantees of the DiskANN Family of Graphs

ICML 2025poster

Graph-based data structures have become powerful and ubiquitous tools for scalable approximate nearest-neighbor (ANN) search over the past decade. In spite of their apparent practical performance, there has only recently been progress on the **worst-case** performance of these data structures. Indee…

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2023

Composable Coresets for Determinant Maximization: Greedy is Almost Optimal

NeurIPS 2023poster

Given a set of $n$ vectors in $\mathbb{R}^d$, the goal of the \emph{determinant maximization} problem is to pick $k$ vectors with the maximum volume. Determinant maximization is the MAP-inference task for determinantal point processes (DPP) and has recently received considerable attention for model…

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