56 citations · 225 across the 37 of their papers we have counts for
4 papers · 1 filter
A Sharp Lower Bound for Mixed-membership Estimation
Jiashun Jin, Zheng Tracy Ke
Consider an undirected network with nodes and perceivable communities, where some nodes may have mixed memberships. We assume that for each node , there is…
Mixed Membership Estimation for Social Networks
Jiashun Jin, Zheng Tracy Ke, Shengming Luo
In economics and social science, network data are regularly observed, and a thorough understanding of the network community structure facilitates the comprehension of economic patt…
Covariate Assisted Variable Ranking
Zheng Tracy Ke, Fan Yang
Consider a linear model , . The Gram matrix is non-sparse, but it is approximately the sum of two components, a low-rank matr…
Using SVD for Topic Modeling
Zheng Tracy Ke, Minzhe Wang
The probabilistic topic model imposes a low-rank structure on the expectation of the corpus matrix. Therefore, singular value decomposition (SVD) is a natural tool of dimension red…