William Yun Chen

Assistant Professor

Research Interests

Moduli of elliptic curves, noncongruence subgroups of SL(2,Z), Hurwitz spaces, Galois theory, combinatorial group theory

Additional Campus Affiliations

Assistant Professor, Mathematics

Recent Publications

Chen, W. Y., Lubotzky, A., & Tiep, P. H. (2026). Finite simple characteristic quotients of the free group of rank 2. Commentarii Mathematici Helvetici, 101(2), 305-344. https://doi.org/10.4171/CMH/600

Chen, W. Y., & Salter, N. (2025). FAMILIES OF ELLIPTIC CURVES OVER THE FOUR-POINTED CONFIGURATION SPACE AND EXCEPTIONAL SEQUENCES FOR THE BRAID GROUP ON FOUR STRANDS. Proceedings of the American Mathematical Society, 153(8), 3253-3262. https://doi.org/10.1090/proc/17221

Chen, W. Y., Lubotzky, A., & Tiep, P. H. (2025). Non-congruence presentations of finite simple groups. Rendiconti del Seminario Matematico dell 'Universita' di Padova/Mathematical Journal of the University of Padova, 36(3), 445-483. https://doi.org/10.4171/RLM/1078

Chen, W., Kontorovich, A., & Sikander, S. (2025). Remarks on the Z/p Dijkgraaf-Witten Invariants of 3D Mapping Tori. Communications in Mathematical Physics, 406(5), Article 119. https://doi.org/10.1007/s00220-025-05279-5

Chen, W. Y. (2024). Nonabelian level structures, Nielsen equivalence, and Markoff triples. Annals of Mathematics, 199(1), 301-443. https://doi.org/10.4007/annals.2024.199.1.5

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