Oct 2025: new paper "How to Set β1, β2 in Adam: An Online Learning Perspective" uploaded to Arxiv.

Sep 2025: I visited Christos's group at UBC and gave a talk on the expressive power of one-layer transformers for in-context recall task. It was a great experience discussing research with Christos, Tina and Puneesh.

Jul 2025: I attended COLT in Lyon and ICML in Vancouver. I gave a talk at COLT on adaptive regret bounds for multi-armed bandits, and gave a poster presentation at ICML on stochastic min-max optimization. It was great visiting ENS, catching up with familiar folks (Taira, Shinji, Cristóbal, Bingshan, Andi, Waleed....)  and meeting new (Yan, Haipeng, Yuwei, Mark, Christos....) people!

May 2025 (2): new paper "One-Layer Transformers are Provably Optimal for In-context Reasoning and Distributional Association Learning in Next-Token Prediction Tasks" uploaded to Arxiv. This is a joint work with Thanh Nguyen-Tang.

May 2025 (1): One paper accepted to ICML and another paper accepted to COLT.

Feb 2025: new paper "Data-dependent Bounds with T-Optimal Best-of-Both-Worlds Guarantees in Multi-Armed Bandits using Stability-Penalty Matching." uploaded to Arxiv. This is a joint work with Shinji Ito, Junpei Komiyama and Nishant Mehta. This work came out of my time at RIKEN AIP. 

Jan 2025: I officially became a Canadian permanent resident! 

Nov 2024:  I got selected as a Top Reviewer at NeurIPS 2024 and received a free registration pass. Thank you NeurIPS, and see you all in Vancouver this December!

Oct 2024: new paper "Beyond Minimax Rates in Group Distributionally Robust Optimization via a Novel Notion of Sparsity" uploaded to Arxiv. This is a joint work with Nishant Mehta and Cristóbal Guzmán.

Sep 2024: I started my PhD Internship at RIKEN AIP / University of Tokyo in Japan, hosted by Shinji Ito. Excited to spend the next three months working on multi-armed bandits in Todai.

May 2024: I attended AISTATS 2024 in Valencia, Spain and met my Hamburg classmate and close friend Waleed Mustafa there. Also, it was great talking to Nicolo Cesa-Bianchi when he visited my poster!

Mar 2024: I attended AAAI 2024 in Vancouver and gave a workshop talk on group distributionally robust optimization.

Jan 2024: One paper accepted to AISTATS.

Jul 2023: Passed PhD Candidacy.

Feb 2023: I attended ALT at NUS in Singapore.  This was my first time Singapore. Love the food and the NUS campus!

Dec 2022:  One paper accepted to ALT. This is my first pure-theory paper.