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Stop Regressing: Training Value Functions via Classification for Scalable Deep RL
March 7, 2024, 5:42 a.m. | Jesse Farebrother, Jordi Orbay, Quan Vuong, Adrien Ali Ta\"iga, Yevgen Chebotar, Ted Xiao, Alex Irpan, Sergey Levine, Pablo Samuel Castro, Aleksandra
cs.LG updates on arXiv.org arxiv.org
Abstract: Value functions are a central component of deep reinforcement learning (RL). These functions, parameterized by neural networks, are trained using a mean squared error regression objective to match bootstrapped target values. However, scaling value-based RL methods that use regression to large networks, such as high-capacity Transformers, has proven challenging. This difficulty is in stark contrast to supervised learning: by leveraging a cross-entropy classification loss, supervised methods have scaled reliably to massive networks. Observing this discrepancy, …
abstract arxiv classification cs.ai cs.lg deep rl error functions however match mean networks neural networks regression reinforcement reinforcement learning scalable scaling stat.ml training type value values via
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