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For questions related to the book "Reinforcement Learning: An Introduction" (by Andrew Barto and Richard S. Sutton).

2 votes

Why do we have two similar action selection strategies for UCB1?

In the PDF of the original paper for UCB1 you linked, in page 242-243 the authors proves why non-optimal machines get played much less (in fact, logarithmically less) than the optimal ones. $c$ decide …
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