Chung-En Tsai

I am a first-year direct PhD student in Computer Science at ETH Zürich. I am fortunate to be advised by Prof. Niao He and to be a member of the ODI group, which is part of the Institute for Machine Learning. Previously, I earned my bachelor's degree in Computer Science and Information Engineering at National Taiwan University, where I was advised by Prof. Yen-Huan Li.

My research focuses on the theory of machine learning and optimization. I have served as a reviewer for NeurIPS 2024 and ICLR 2025 and a volunteer at ISIT 2023. I enjoy learning mathematics, computer science, and natural sciences in general.

For more details, please check my CV.

Papers below are classified by topics and sorted in the chronological order. Please check my Google scholar profile for an up-to-date list.

1. [paper] Online self-concordant and relatively smooth minimization, with applications to online portfolio selection and learning quantum states
   Chung-En Tsai, Hao-Chung Cheng, and Yen-Huan Li
   ALT 2023
2. [paper] Faster stochastic first-order method for maximum-likelihood quantum state tomography
   Chung-En Tsai, Hao-Chung Cheng, and Yen-Huan Li
   QIP 2023
3. [paper] Data-dependent bounds for online portfolio selection without Lipschitzness and smoothness
   Chung-En Tsai, Ying-Ting Lin, and Yen-Huan Li
   NeurIPS 2023, NOPTA 2024
4. [paper] Fast minimization of expected logarithmic loss via stochastic dual averaging
   Chung-En Tsai, Hao-Chung Cheng, and Yen-Huan Li
   AISTATS 2024
5. [paper] Computing Augustin information via hybrid geodesically convex optimization
   Guan-Ren Wang, Chung-En Tsai, Hao-Chung Cheng, and Yen-Huan Li
   ISIT 2024, NOPTA 2024
6. [paper] Linear convergence in Hilbert's projective metric for computing Augustin information and a Rényi information measure
   Chung-En Tsai*, Guan-Ren Wang*, Hao-Chung Cheng, and Yen-Huan Li
   

1. [paper] On the synchronization analysis of a strong competition Kuramoto model
   Chun-Hsiung Hsia and Chung-En Tsai
   

If you have any suggestions or comments about the notes, feel free to email me. Thank you!

1. Online Portfolio Selection
2. The Euler-Lagrange Equation and Hamilton's Equations

• Office: OAT, Andreasstrasse 5, 8092 Zürich
• Email: chungentsai1007 at gmail dot com