551 citations · 1.1k across the 33 of their papers we have counts for
6 papers · 1 filter
Persistence of centrality in random growing trees
Varun Jog, Po-Ling Loh
We investigate properties of node centrality in random growing tree models. We focus on a measure of centrality that computes the maximum subtree size of the tree rooted at each no…
Confidence Sets for the Source of a Diffusion in Regular Trees
Justin Khim, Po-Ling Loh
We study the problem of identifying the source of a diffusion spreading over a regular tree. When the degree of each node is at least three, we show that it is possible to construc…
High-dimensional robust precision matrix estimation: Cellwise corruption under -contamination
Po-Ling Loh, Xin Lu Tan
We analyze the statistical consistency of robust estimators for precision matrices in high dimensions. We focus on a contamination mechanism acting cellwise on the data matrix. The…
Information-theoretic bounds for exact recovery in weighted stochastic block models using the Renyi divergence
Varun Jog, Po-Ling Loh
We derive sharp thresholds for exact recovery of communities in a weighted stochastic block model, where observations are collected in the form of a weighted adjacency matrix, and…
On model misspecification and KL separation for Gaussian graphical models
Varun Jog, Po-Ling Loh
We establish bounds on the KL divergence between two multivariate Gaussian distributions in terms of the Hamming distance between the edge sets of the corresponding graphical model…
Statistical consistency and asymptotic normality for high-dimensional robust M-estimators
Po-Ling Loh
We study theoretical properties of regularized robust M-estimators, applicable when data are drawn from a sparse high-dimensional linear model and contaminated by heavy-tailed dist…