Jiaxin Qiu's Homepage

😀 About Me

Hi! 👋 I am currently a Postdoctoral Fellow in the Department of Mathematics at the University of Hong Kong, where I am mentored by Dr. Zhigang Bao.

Ph.D. in Statistics, The University of Hong Kong, 2020 - 2024
- Supervisors: Prof. Jianfeng (Jeff) Yao (CUHK-SZ) and Dr. Zeng Li (SUSTech)
M.Sc. in Statistics, Harbin Institute of Technology, 2018 - 2020
- Supervisor: Prof. Guoliang Tian
B.Sc. in Mathematics, Southern University of Science and Technology, 2014 - 2018

[* = corresponding author]

Jiaxin Qiu, Zeng Li*, Jianfeng Yao (2023). Asymptotic normality for eigenvalue statistics of a general sample covariance matrix when p/n->infinity and applications. The Annals of Statistics, 51(3): 1427-1451. [PDF]
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. [PDF]
Jiaxin Qiu, Zeng Li*, Jianfeng Yao (2024). Robust estimation for number of factors in high dimensional factor modeling via Spearman correlation matrix. Journal of the American Statistical Association (in press). [PDF]

[The preprints on this website may be more up-to-date than their arXiv versions.]

Qianqian Jiang, Jiaxin Qiu, Zeng Li* (2025+). On eigenvalues of sample covariance matrices based on high-dimensional compositional data. Submitted. [PDF]
Jiaxin Qiu, Zeng Li*, Jianfeng Yao (2025+). On spiked eigenvalues of general sample covariance matrices under extreme aspect ratio. Working Paper.

@HKU
- STAT6010/7610: Advanced Probability (Fall 2023)
- STAT2601: Probability and Statistics (Spring 2021, Spring 2024)
@SUSTech
- STA5001: High Dimensional Statistics (Spring 2022, Spring 2023)
- MA308: Statistical Computation and Software (Fall 2020)
- MAT7102/MA412: Selected Research Topics in Statistics (Spring 2020)
- MA103A: Linear Algebra A (Fall 2018, Fall 2019)