Fan, Xiaomeng, Zhi Gao, Yuwei Wu, Yunde Jia, and Mehrtash Harandi. “Learning a Gradient-Free Riemannian Optimizer on Tangent Spaces”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 8 (May 18, 2021): 7377–7384. Accessed May 26, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/16905.