Yichen Qin

I am an assistant professor at Fudan University. I completed my PhD in September 2022 at École Polytechnique under the supervision of Javier Fresán and Claude Sabbah, and was subsequently a postdoc at Humboldt Universität zu Berlin with Bruno Klingler until 2025.

My research interests are in arithmetic geometry, mainly about exponential sums, Hodge theory, and periods.

Here is my CV.

Address :
School of Mathematical Sciences
Fudan University
Handan Road 220, Shanghai 200437
Email : Click here .
Office : Guanghua Tower, East Main-Building, 1903

Preprints and Publications

(with Javier Fresán and Joshua Lam) On Siegel's problem and Dwork's conjecture for $G$ -functions,
submitted.
(with Christian Sevenheck and Peter Spacek) Irregular Hodge numbers of Frenkel-Gross connections,
to appear in Algebraic Geometry.
(with Pengfei Huang and Hao Sun) Rigid $G$ -connections and nilpotency of $p$ -curvatures,
arXiv:2410.09929.
(with Daxin Xu) Irregular Hodge filtration of hypergeometric differential equations,
Algebra & Number Theory, Vol. 19 (2025), No. 12, 2481-2514. DOI.
$L$ -functions of Kloosterman sheaves,
Proceedings of the London Mathematical Society, Vol. 129 (Issue 5), e70003. DOI.
Sagemath code.
Hodge numbers of motives attached to Kloosterman and Airy moments,
Journal für die reine und angewandte Mathematik (Crelle's Journal), Vol. 2024 (Issue 808), 143-192. DOI.

Organization

+Seminars

Fudan Number Theory Seminar, a joint seminar of SMS, SCMS and SIMIS.
Organizers: Miaofen Chen, Yichen Qin, Rufei Ren, Haining Wang, Yupeng Wang, Lingfei Yi, Dingxin Zhang.

+Conferences and Workshops

2025 Conference on Analytic Number Theory, Fudan University, Shanghai.
Organizers: Miaofen Chen, Yichen Qin, Rufei Ren, Haining Wang, Yupeng Wang, Lingfei Yi, Dingxin Zhang.

Teaching

+At Fudan University

2025 Autumn: TA of MATH10009 - Advanced Algebra.
Instructor: Prof. Qihong Xie.

+At École Polytechnique (2019-2022)

2021 Autumn: TA of MAA201 - Euclidean and Hermitian spaces at École Polytechnique.
Instructor: Prof. David Renard.

2021 Spring: TA of MAA206 - Quadratic Forms and Applications at École Polytechnique.
Instructor: Prof. Thomas Gauthier.

2019 Spring: TA of MAA105 - Integral and Differential Calculus at École Polytechnique.
Instructor: Prof. Jérémie Bettinelli.

2019 Spring: TA of MAA206 - Quadratic Forms and Applications at École Polytechnique.
Instructor: Prof. Thomas Gauthier.