2 citations · 3 across the 4 of their papers we have counts for
4 papers
Missingness-Adaptive Factor Identification in High-Dimensional Data
Ping Zeng, Yicheng Zeng, Lixing Zhu
Determining the number of factors in high-dimensional factor models remains a fundamental challenge, particularly when data are incomplete. This paper introduces the concept of ide…
Sketched Ridgeless Linear Regression: The Role of Downsampling
Xin Chen, Yicheng Zeng, Siyue Yang +1
Overparametrization often helps improve the generalization performance. This paper presents a dual view of overparametrization suggesting that downsampling may also help generalize…
Limiting laws for extreme eigenvalues of large-dimensional spiked Fisher matrices with a divergent number of spikes
Junshan Xie, Yicheng Zeng, Lixing Zhu
Consider the matrix that is the product of a population covariance matrix and the inverse of another population covariance matrix. Suppose that their difference has a d…
Order Determination for Spiked Models
Yicheng Zeng, Lixing Zhu
Motivated by dimension reduction in regression analysis and signal detection, we investigate the order determination for large dimension matrices including spiked models of which t…