Baoshen Guo Zhiqing Hong Junyi Li Shenhao Wang Jinhua Zhao 0001 Leveraging the Spatial Hierarchy: Coarse-to-fine Trajectory Generation via Cascaded Hybrid Diffusion. 2025 July abs/2507.13366 CoRR https://doi.org/10.48550/arXiv.2507.13366 db/journals/corr/corr2507.html#abs-2507-13366 streams/journals/corr