@article{JMLR:2025:Zhang,<br>
author={Lijun Zhang and Yibo Wang and Guanghui Wang and Jinfeng Yi and Tianbao Yang},<br>
journal={Journal of Machine Learning Research (JMLR)},<br>
title={Universal Online Convex Optimization Meets Second-order Bounds},<br>
year={2025},<br>
volume={26},<br>
number={152},<br>
pages={1--53},<br>
}