Hai-Xiao Wang 王海霄

Department of Applied Mathematics

University of Washington

Lewis Hall 116

Welcome to my homepage! Starting from Sep 2026, I am a Pearson Fellow/Acting Instructor in the Department of Applied Mathematics at the University of Washington.

From Aug 2025 to Aug 2026, I was a Van Vleck visiting assistant professor in the Department of Mathematics at the University of Wisconsin-Madison. Before that, I received my Ph.D. in mathematics from University of California San Diego, under the supervision of Professor Ioana Dumitriu. I received my B.S. in Physics and B.A. in Economics from Peking University.

My research focus on random matrix theory with its applications in statistics and mathematics of data science. Feel free to contact me if any of my research interests you.

Selected publications

arXiv

Concentration of Regularized Sparse Random Matrices: Spectral Edge Bounds via Nonbacktracking Operators

Hai-Xiao Wang

arXiv preprint arXiv:2609.26615, 2026

arXiv Bib

@article{Wang2026RegularizedSparse,
  title = {Concentration of Regularized Sparse Random Matrices: Spectral Edge Bounds via Nonbacktracking Operators},
  author = {Wang, Hai-Xiao},
  journal = {arXiv preprint arXiv:2609.26615},
  year = {2026},
}

AoS

Optimal and exact recovery on the general nonuniform Hypergraph Stochastic Block Model

Ioana Dumitriu and Hai-Xiao Wang

The Annals of Statistics, 54(1), pp. 48–73, 2026

DOI arXiv Bib

@article{Dumitriu2023OptimalAE,
  title = {Optimal and exact recovery on the general nonuniform Hypergraph Stochastic Block Model},
  author = {Dumitriu, Ioana and Wang, Hai-Xiao},
  journal = {The Annals of Statistics},
  volume = {54},
  number = {1},
  pages = {48--73},
  year = {2026},
  doi = {10.1214/25-AOS2524},
  publisher = {Institute of Mathematical Statistics},
}

arXiv

Singular values of sparse random rectangular matrices: Emergence of outliers at criticality

Ioana Dumitriu, Hai-Xiao Wang, Zhichao Wang, and Yizhe Zhu

arXiv preprint arXiv:2508.01456, 2025

arXiv Bib

@article{dumitriu2025singular,
  title = {Singular values of sparse random rectangular matrices: Emergence of outliers at criticality},
  author = {Dumitriu, Ioana and Wang, Hai-Xiao and Wang, Zhichao and Zhu, Yizhe},
  journal = {arXiv preprint arXiv:2508.01456},
  year = {2025},
}