Choi, Sunmook (/tʃɔɪ sʌnˈmʊk/), 최선묵 (崔善默)
I am a second-year PhD student in Center for Applied Mathematics (CAM) at Cornell University.
I study learning-based control under the supervision of Professor Sarah Dean. My current research is mainly focused on linear dynamics with bilinear observations:
\[\begin{aligned} x_{t+1} &= Ax_t + Bu_t + w_t \\ y_t &= u_t^\top C x_t + z_t \quad \text{or} \quad y_t = \left(C_0 + \sum_{k=1}^p (u_t)_k C_k \right)x_t + v_t \end{aligned}\]My work consists of bandit problems, optimal control problems, and applications in recommender systems.
I received my B.S. in Mathematics in 2022 and my M.S. in Mathematics in 2024, both from Korea University (KU). At KU, I’d had the pleasure of working with Professor Seungsang Oh in DLmath Lab. I had mainly worked on deep learning in audio domain, such as model design for audio spoofing detection, automatic speaker verification (ASV), etc.
Publications
My papers are available in Google Scholar.
Teaching
In Spring 2026, I am a teaching assistant of MATH4310: Linear Algebra . In previous semesters, I was a TA of MATH2940: Linear Algebra for Engineers in (Fall 2024, Spring 2025, Fall 2025). At KU, I was a TA in MATH221: Linear Algebra I in (Spring 2022, Spring 2023) and MATH222: Linear Algebra II in (Fall 2022, Fall 2023).
News
- [New!] 05/2026: Attended AISTATS in Tanger, Morocco! Presented a poster.
- [New!] 04/2026: Our paper got accepted to ICML 2026! (with Y. Sattar, L. Maynard-Zhang, Y. Jedra, M. Fazel, S. Dean)
- [New!] 04/2026: A paper is now available in arXiv! (paper link)
- 03/2026: Served as a reviewer for ICML 2026.
- 01/2026: Accepted to AISTATS 2026! (paper link)
- 12/2025: Attended CDC 2025 in Rio, Brazil! Presented a 15-minute talk about this paper.
- 05/2025: Attended NESCW 2025 in Columbia University! Presented a poster about this paper.