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MICo: Improved representations via sampling-based state similarity for Markov decision processes
Pablo Samuel Castro · Tyler Kastner · Prakash Panangaden · Mark Rowland

Tue Dec 07 08:30 AM -- 10:00 AM (PST) @

We present a new behavioural distance over the state space of a Markov decision process, and demonstrate the use of this distance as an effective means of shaping the learnt representations of deep reinforcement learning agents. While existing notions of state similarity are typically difficult to learn at scale due to high computational cost and lack of sample-based algorithms, our newly-proposed distance addresses both of these issues. In addition to providing detailed theoretical analyses, we provide empirical evidence that learning this distance alongside the value function yields structured and informative representations, including strong results on the Arcade Learning Environment benchmark.

Author Information

Pablo Samuel Castro (Google)
Tyler Kastner (McGill University)
Prakash Panangaden (McGill University, Montreal)
Mark Rowland (DeepMind)

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