Authors

Prakhar Mehrotra

Publications 2

Preprint Open access

CM-DPO: Constraint-Margin Direct Preference Optimization for LLM Planning

Rabimba Karanjai, Qun Gu, Hemanth Hegadehalli Madhavarao et al. · 2026

Direct Preference Optimization (DPO) treats all constraint violations equally: a $1 budget overshoot and a $1,000 overshoot induce the same training signal. It is also susceptible to length and style bias when preference pairs come from different model families. We introduce Constraint-Margin DPO (CM-DPO), which replac …

Preprint Open access

SCOPE: Observation-Conditioned Full-Target Prediction for Sparse PDE Inference

Ruichen Xu, Siyao Wang, Fang Wan et al. · 2026

Recovering complete physical fields from sparse observations is challenging because the measurements may not uniquely determine the underlying state. Diffusion-based PDE solvers address this problem through iterative sampling whereas neural operators provide deterministic one-pass predictions. We propose SCOPE (Sparse- …

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