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Danilo Jimenez Rezende, Ivo Danihelka, G. Papamakarios, Nan Rosemary Ke, Ray Jiang, T. Weber, Karol Gregor, Hamza Merzic, Fabio Viola, Jane X. Wang, Jovana Mitrovic, F. Besse, Ioannis Antonoglou, Lars Buesing
30 7. 2. 2020.

Causally Correct Partial Models for Reinforcement Learning

In reinforcement learning, we can learn a model of future observations and rewards, and use it to plan the agent's next actions. However, jointly modeling future observations can be computationally expensive or even intractable if the observations are high-dimensional (e.g. images). For this reason, previous works have considered partial models, which model only part of the observation. In this paper, we show that partial models can be causally incorrect: they are confounded by the observations they don't model, and can therefore lead to incorrect planning. To address this, we introduce a general family of partial models that are provably causally correct, yet remain fast because they do not need to fully model future observations.


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