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Noisy Symbolic Abstractions for Deep RL: A case study with Reward Machines. (arXiv:2211.10902v2 [cs.LG] UPDATED)
Nov. 24, 2022, 7:13 a.m. | Andrew C. Li, Zizhao Chen, Pashootan Vaezipoor, Toryn Q. Klassen, Rodrigo Toro Icarte, Sheila A. McIlraith
cs.LG updates on arXiv.org arxiv.org
Natural and formal languages provide an effective mechanism for humans to
specify instructions and reward functions. We investigate how to generate
policies via RL when reward functions are specified in a symbolic language
captured by Reward Machines, an increasingly popular automaton-inspired
structure. We are interested in the case where the mapping of environment state
to a symbolic (here, Reward Machine) vocabulary -- commonly known as the
labelling function -- is uncertain from the perspective of the agent. We
formulate the …
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