Boosting the Actor with Dual Critic
| Autor: | Dai, Bo, Shaw, Albert, He, Niao, Li, Lihong, Song, Le |
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| Rok vydání: | 2017 |
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| Druh dokumentu: | Working Paper |
| Popis: | This paper proposes a new actor-critic-style algorithm called Dual Actor-Critic or Dual-AC. It is derived in a principled way from the Lagrangian dual form of the Bellman optimality equation, which can be viewed as a two-player game between the actor and a critic-like function, which is named as dual critic. Compared to its actor-critic relatives, Dual-AC has the desired property that the actor and dual critic are updated cooperatively to optimize the same objective function, providing a more transparent way for learning the critic that is directly related to the objective function of the actor. We then provide a concrete algorithm that can effectively solve the minimax optimization problem, using techniques of multi-step bootstrapping, path regularization, and stochastic dual ascent algorithm. We demonstrate that the proposed algorithm achieves the state-of-the-art performances across several benchmarks. Comment: 21 pages, 9 figures |
| Databáze: | arXiv |
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