Search Results for author: Justin Y. Chen

Found 8 papers, 2 papers with code

Improved Frequency Estimation Algorithms with and without Predictions

no code implementations NeurIPS 2023 Anders Aamand, Justin Y. Chen, Huy Lê Nguyen, Sandeep Silwal, Ali Vakilian

In particular, their learning-augmented frequency estimation algorithm uses a learned heavy-hitter oracle which predicts which elements will appear many times in the stream.

Data Structures for Density Estimation

1 code implementation20 Jun 2023 Anders Aamand, Alexandr Andoni, Justin Y. Chen, Piotr Indyk, Shyam Narayanan, Sandeep Silwal

We study statistical/computational tradeoffs for the following density estimation problem: given $k$ distributions $v_1, \ldots, v_k$ over a discrete domain of size $n$, and sampling access to a distribution $p$, identify $v_i$ that is "close" to $p$.

Density Estimation

Learned Interpolation for Better Streaming Quantile Approximation with Worst-Case Guarantees

no code implementations15 Apr 2023 Nicholas Schiefer, Justin Y. Chen, Piotr Indyk, Shyam Narayanan, Sandeep Silwal, Tal Wagner

An $\varepsilon$-approximate quantile sketch over a stream of $n$ inputs approximates the rank of any query point $q$ - that is, the number of input points less than $q$ - up to an additive error of $\varepsilon n$, generally with some probability of at least $1 - 1/\mathrm{poly}(n)$, while consuming $o(n)$ space.

Improved Space Bounds for Learning with Experts

no code implementations2 Mar 2023 Anders Aamand, Justin Y. Chen, Huy Lê Nguyen, Sandeep Silwal

We give improved tradeoffs between space and regret for the online learning with expert advice problem over $T$ days with $n$ experts.

Exponentially Improving the Complexity of Simulating the Weisfeiler-Lehman Test with Graph Neural Networks

no code implementations6 Nov 2022 Anders Aamand, Justin Y. Chen, Piotr Indyk, Shyam Narayanan, Ronitt Rubinfeld, Nicholas Schiefer, Sandeep Silwal, Tal Wagner

However, those simulations involve neural networks for the 'combine' function of size polynomial or even exponential in the number of graph nodes $n$, as well as feature vectors of length linear in $n$.

Triangle and Four Cycle Counting with Predictions in Graph Streams

no code implementations ICLR 2022 Justin Y. Chen, Talya Eden, Piotr Indyk, Honghao Lin, Shyam Narayanan, Ronitt Rubinfeld, Sandeep Silwal, Tal Wagner, David P. Woodruff, Michael Zhang

We propose data-driven one-pass streaming algorithms for estimating the number of triangles and four cycles, two fundamental problems in graph analytics that are widely studied in the graph data stream literature.

(Optimal) Online Bipartite Matching with Degree Information

no code implementations21 Oct 2021 Anders Aamand, Justin Y. Chen, Piotr Indyk

For the bipartite version of a stochastic graph model due to Chung, Lu, and Vu where the expected values of the offline degrees are known and used as predictions, we show that MinPredictedDegree stochastically dominates any other online algorithm, i. e., it is optimal for graphs drawn from this model.

Worst-Case Analysis for Randomly Collected Data

1 code implementation NeurIPS 2020 Justin Y. Chen, Gregory Valiant, Paul Valiant

Crucially, we assume that the sets $A$ and $B$ are drawn according to some known distribution $P$ over pairs of subsets of $[n]$.

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