Comments on the Du-Kakade-Wang-Yang Lower Bounds

18 Nov 2019  ·  Benjamin Van Roy, Shi Dong ·

Du, Kakade, Wang, and Yang recently established intriguing lower bounds on sample complexity, which suggest that reinforcement learning with a misspecified representation is intractable. Another line of work, which centers around a statistic called the eluder dimension, establishes tractability of problems similar to those considered in the Du-Kakade-Wang-Yang paper. We compare these results and reconcile interpretations.

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