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cs.AI2026
Self-Evolving Neuro-Symbolic Skills for Tool-Augmented Spatial Reasoning
Shi-Yu Tian, Zhuo-Xia Wang, Xuan-Yi Zhu +6
Large vision-language models have achieved strong performance in multimodal reasoning, but they remain unreliable on fine-grained spatial tasks that demand both precise spatial per…
cs.AI2025★ 1 cited
Preference Optimization via Contrastive Divergence: Your Reward Model is Secretly an NLL Estimator
Zhuotong Chen, Fang Liu, Xuan Zhu +2
Existing studies on preference optimization (PO) have centered on constructing pairwise preference data following simple heuristics, such as maximizing the margin between preferred…