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On Lower Bounds for Standard and Robust Gaussian Process Bandit Optimization

ICML 2021 · Bandits and online learning › Online convex optimization and games · approach: Best-of-both-worlds bandit algorithms · 7 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Apply the alternative KL-based lower-bound proofStandard noisy GP bandit optimization with the SE kernel · Standard noisy GP bandits, SE kernelcumulative regret lower bound: \Omega\Big(\sqrt{T(\log T)^{d/2}}\Big) -> \Omega^{*}\Big(\sqrt{T(\log T)^{d/2}\log\frac{1}{\delta}}\Big)Helped
Apply the alternative KL-based lower-bound proofStandard noisy GP bandit optimization with the Matérn-ν kernel · Standard noisy GP bandits, Matérn-ν kernelcumulative regret lower bound: \Omega\Big(T^{\frac{\nu+d}{2\nu+d}}\Big) -> \Omega\Big(T^{\frac{\nu+d}{2\nu+d}}\big(\log\frac{1}{\delta}\big)^{\frac{\nuHelped
Account for joint dependence on corruption level and time horizonDeterministic GP bandit algorithms with corrupted samples · Corrupted samples, SE and Matérn-ν kernelscumulative regret lower bound: \Omega\Big(\underline{R}_T^{\rm std} + C\Big) -> \Omega\Big(\underline{R}_T^{\rm std} + C(\log T)^{d/2}\Big) (SE); \OmegHelped
Allow the corrupted-final-point lower bound to apply at arbitrary success probabilities above 2/3Robust GP bandit optimization with a corrupted final point · Corrupted final point, SE and Matérn-ν kernelstime to ε-optimality: \Omega\Big(\frac{1}{\epsilon^{2}}\big(\log\frac{1}{\epsilon}\big)^{\frac{d}{2}}\Big) -> \Omega\Big(\frac{1}{\epsilon^{2}Helped

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