A closed-form inertial model of GRPO dynamics that subsumes single-exponential saturation as its overdamped limit and predicts group-size invariance, stability thresholds, and overdamped-to-oscillatory transitions.
New skills or sharper primitives? a probabilistic perspective on the emergence of reasoning in rlvr.arXiv preprint arXiv:2602.08281,
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Predictable GRPO: A Closed-Form Model of Training Dynamics
A closed-form inertial model of GRPO dynamics that subsumes single-exponential saturation as its overdamped limit and predicts group-size invariance, stability thresholds, and overdamped-to-oscillatory transitions.