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Moses Charikar

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titleconferencedate
Sketching Techniques for Kernel Density EstimationSketching and Algorithm Design 20232023-10-09
Presents concrete algorithms that turn kernel density estimation into a sketching data structure using locality-sensitive hashing for distance-biased sampling…
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A New Model for Ant Trail Formation and its Convergence PropertiesITCS 20212021-01-06
A flow-based pheromone model on directed graphs is defined with decay, node leakage and forward/backward unit flows and a linear decision rule; for two…
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Importance Sampling in High Dimensions via HashingSublinear Algorithms and Nearest-Neighbor Search2018-11-27
Shows a concrete technique: turn locality‑sensitive hashing into an importance sampler so kernel‑sum estimation gets query time ~1/√μ (vs 1/μ for uniform…
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Efficient Profile Maximum Likelihood for Universal Symmetric Property EstimationRobust and High-Dimensional Statistics (Simons Institute workshop, 2018)2018-10-29
Algorithm computes an approximate profile maximum likelihood distribution with objective value within a factor exp(O(N^{2/3})) of optimal, running in…
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Integrating Functions via Distance Sensitive HashingReal-Time Decision Making 20182018-04-30
Claims a data structure that estimates partition-like sums z(y)=sum_x exp(phi(<x,y>)) faster than naive sampling: random sampling needs ~1/mu probes but this…
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Local Guarantees in Graph Cuts and ClusteringDiscrete Optimization via Continuous Relaxation2017-09-11
Defines min-max variants of cuts and correlation clustering, gives an LP relaxation and a deterministic ball-growing rounding that picks a 1/7 ball then a 3/7…
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Exact Recovery via Convex RelaxationsSpectral Algorithms: From Theory to Practice 20142014-10-27
Convex relaxations often recover exact clusterings under random models: experiments show a pairwise LP is integral 88% of the time, strengthened to 100% for…
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Tensor Decompositions: Uniqueness and Smoothed AnalysisSemidefinite Optimization, Approximation and Applications 20142014-09-24
Proves a robust analog of Kruskal's theorem so noisy empirical moment tensors yield factor estimates with polynomially related error, and analyzes a smoothed…
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