Hi! 👋 I am currently a Postdoctoral Fellow in the Department of Mathematics at the University of Hong Kong, where I am mentored by Zhigang Bao.
[* = corresponding author, † = equal contribution, α-β: alphabetical order]
Jiaxin Qiu, Zeng Li*, Jianfeng Yao (2023). Asymptotic normality for eigenvalue statistics of a general sample covariance matrix when p/n → ∞ and applications. The Annals of Statistics, 51(3): 1427-1451.
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Zhanting Long, Zeng Li*, Ruitao Lin, Jiaxin Qiu (2023). On singular values of large dimensional lag-tau sample auto-correlation matrices. Journal of Multivariate Analysis, 197.
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Jiaxin Qiu, Zeng Li*, Jianfeng Yao (2025). Robust estimation for number of factors in high dimensional factor modeling via Spearman correlation matrix. Journal of the American Statistical Association, 120:550, 1139-1151.
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[The preprints on this website may be more up-to-date than their arXiv versions.]
Zhigang Bao, Kha Man Cheong, Yuji Li, Jiaxin Qiu (α-β) (2026). A spectral approach for online covariance change point detection.
Submitted.
arXiv
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Qianqian Jiang†, Jiaxin Qiu†, Zeng Li* (2023). On eigenvalues of sample covariance matrices based on high-dimensional compositional data.
Submitted.
arXiv
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Jiaxin Qiu, Zeng Li*, Jianfeng Yao (2026). On spiked eigenvalues of general sample covariance matrices under extreme aspect ratio. Working Paper.
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