Search Results for author: Yuval Rabani

Found 8 papers, 0 papers with code

Identification of Mixtures of Discrete Product Distributions in Near-Optimal Sample and Time Complexity

no code implementations25 Sep 2023 Spencer L. Gordon, Erik Jahn, Bijan Mazaheri, Yuval Rabani, Leonard J. Schulman

We consider the problem of identifying, from statistics, a distribution of discrete random variables $X_1,\ldots, X_n$ that is a mixture of $k$ product distributions.

2k Tensor Decomposition

Causal Inference Despite Limited Global Confounding via Mixture Models

no code implementations22 Dec 2021 Spencer L. Gordon, Bijan Mazaheri, Yuval Rabani, Leonard J. Schulman

A Bayesian Network is a directed acyclic graph (DAG) on a set of $n$ random variables (the vertices); a Bayesian Network Distribution (BND) is a probability distribution on the random variables that is Markovian on the graph.

Causal Inference

Source Identification for Mixtures of Product Distributions

no code implementations29 Dec 2020 Spencer L. Gordon, Bijan Mazaheri, Yuval Rabani, Leonard J. Schulman

We give an algorithm for source identification of a mixture of $k$ product distributions on $n$ bits.

The Sparse Hausdorff Moment Problem, with Application to Topic Models

no code implementations16 Jul 2020 Spencer Gordon, Bijan Mazaheri, Leonard J. Schulman, Yuval Rabani

We give an algorithm for identifying a $k$-mixture using samples of $m=2k$ iid binary random variables using a sample of size $\left(1/w_{\min}\right)^2 \cdot\left(1/\zeta\right)^{O(k)}$ and post-sampling runtime of only $O(k^{2+o(1)})$ arithmetic operations.

2k Topic Models

Online Multiserver Convex Chasing and Optimization

no code implementations15 Apr 2020 Sébastien Bubeck, Yuval Rabani, Mark Sellke

We introduce the problem of $k$-chasing of convex functions, a simultaneous generalization of both the famous k-server problem in $R^d$, and of the problem of chasing convex bodies and functions.

Clustering

Learning Arbitrary Statistical Mixtures of Discrete Distributions

no code implementations10 Apr 2015 Jian Li, Yuval Rabani, Leonard J. Schulman, Chaitanya Swamy

We study the problem of learning from unlabeled samples very general statistical mixture models on large finite sets.

Collaborative Filtering Topic Models

Learning Mixtures of Arbitrary Distributions over Large Discrete Domains

no code implementations7 Dec 2012 Yuval Rabani, Leonard Schulman, Chaitanya Swamy

(In the topic-model learning setting, the mixture constituents correspond to the topic distributions.)

2k Dimensionality Reduction +1

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