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Implicitly Regularized RL with Implicit Q-Values. (arXiv:2108.07041v2 [cs.LG] UPDATED)
June 1, 2022, 1:11 a.m. | Nino Vieillard, Marcin Andrychowicz, Anton Raichuk, Olivier Pietquin, Matthieu Geist
cs.LG updates on arXiv.org arxiv.org
The $Q$-function is a central quantity in many Reinforcement Learning (RL)
algorithms for which RL agents behave following a (soft)-greedy policy w.r.t.
to $Q$. It is a powerful tool that allows action selection without a model of
the environment and even without explicitly modeling the policy. Yet, this
scheme can only be used in discrete action tasks, with small numbers of
actions, as the softmax cannot be computed exactly otherwise. Especially the
usage of function approximation, to deal with continuous …
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