About

I am an Associate Professor in the School of Mathematical Sciences at Xiamen University. My research focuses on the representation theory of reductive groups and the local Langlands program, particularly theta correspondence. I also work on formalized mathematics in Lean and AI-assisted mathematical research.

Publications · Teaching · CV · Formalization Projects

Contact

Address
School of Mathematical Sciences,
Xiamen University
Email
hoxide@xmu.edu.cn, hoxide@gmail.com
Portrait of Jia-Jun Ma

Research Interests

  • Representation theory: reductive groups, theta correspondence, the local Langlands program, Hecke algebras, geometric representation theory, and invariant theory.
  • Formalized mathematics: game theory and representation theory in Lean, AI-assisted mathematical research, and integrating Lean into teaching.

Formalization projects

  • EconCSLib — a Lean 4 library for computational economics and game theory.
  • LanglandsProject — a mathematical knowledge base and Lean foundations for the Langlands program.

Project descriptions and documentation

GitHub: jiajunma · math-xmum

Education

2013 Feb, Ph.D in Mathematics
National University of Singapore, Singapore
Dissertation: Two topics on local theta correspondence
Advisor: Professor Chengbo Zhu
2007 Jun, B.S. in Mathematics
Soochow University, Suzhou Jiangsu China
Final Year Project Advisor: Professor Dingbian Qian

Career History

July 2021 — present
Associate Professor, School of Mathematical Sciences, Xiamen University, China
July 2021 — June 2026
Associate Professor, Department of Mathematics, Xiamen University Malaysia, Malaysia
Jan 2017 — June 2021
Associate Professor (Tenure Track), School of Mathematical Sciences, Shanghai Jiao Tong University, China
Mar 2016 — Dec 2016
Research Fellow, Department of Mathematics, National University of Singapore, Singapore
Sept 2014 — Feb 2016
Postdoctoral Fellow, The Institute of Mathematical Sciences, The Chinese University of Hong Kong, Hong Kong
Oct 2013 — Aug 2014
Postdoctoral Fellow, Department of Mathematics, Ben-Gurion University of the Negev, Israel
Apr 2013 — Aug 2013
Research Fellow, Department of Mathematics, National University of Singapore, Singapore