Chenghao Xu Guangtao Lyu Qi Liu Jiexi Yan Muli Yang Cheng Deng 0002 Towards Arbitrary Motion Completing via Hierarchical Continuous Representation. 2025 December abs/2512.21183 CoRR https://doi.org/10.48550/arXiv.2512.21183 db/journals/corr/corr2512.html#abs-2512-21183 streams/journals/corr