Z. Ke

activity

20132026

most citedCommunity Detection for Hypergraph Networks via Regularized Tensor Power Iteration

56 citations · 225 across the 37 of their papers we have counts for

collaborators

Showing 2016Show all

2 papers · 1 filter

math.ST2016★ 8 cited

Detecting Rare and Weak Spikes in Large Covariance Matrices

Zheng Tracy Ke

Given $p$ -dimensional Gaussian vectors $X_{i} \sim ii d N (0, Σ)$ , $1 \leq i \leq n$ , where $p \geq n$ , we are interested in testing a null hypothesis where $Σ = I_{p}$ agains…

stat.ME2016

A Geometrical Approach to Topic Model Estimation

Zheng Tracy Ke

In the probabilistic topic models, the quantity of interest---a low-rank matrix consisting of topic vectors---is hidden in the text corpus matrix, masked by noise, and the Singular…