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Reinforcement Learning via Fenchel-Rockafellar Duality

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arxiv 2001.01866 v2 pith:IPVEHNFD submitted 2020-01-07 cs.LG stat.ML

Reinforcement Learning via Fenchel-Rockafellar Duality

classification cs.LG stat.ML
keywords dualitypolicylearningresultsconvexevaluationfenchel-rockafellarincluding
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We review basic concepts of convex duality, focusing on the very general and supremely useful Fenchel-Rockafellar duality. We summarize how this duality may be applied to a variety of reinforcement learning (RL) settings, including policy evaluation or optimization, online or offline learning, and discounted or undiscounted rewards. The derivations yield a number of intriguing results, including the ability to perform policy evaluation and on-policy policy gradient with behavior-agnostic offline data and methods to learn a policy via max-likelihood optimization. Although many of these results have appeared previously in various forms, we provide a unified treatment and perspective on these results, which we hope will enable researchers to better use and apply the tools of convex duality to make further progress in RL.

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Cited by 4 Pith papers

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