@inproceedings{NeurIPS'24:universal,
    author = {Yu-Hu Yan and
                    Peng Zhao and
                    Zhi-Hua Zhou},
    title = {A Simple and Optimal Approach for Universal Online Learning with Gradient Variations},
    booktitle = {Advances in Neural Information Processing Systems 37 (NeurIPS)},
    pages = {to appear},
    year = {2024}
}