Jianshu Zhang Yijiang Li Huifeixin Chen Haoran Lu Letian Xue Bingyang Wang Han Liu 0001 SPACENUM: Revisiting Spatial Numerical Understanding in VLMs. 2026 May abs/2605.23898 CoRR https://doi.org/10.48550/arXiv.2605.23898 db/journals/corr/corr2605.html#abs-2605-23898 streams/journals/corr