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Smooth Convex Optimization Using Sub-Zeroth-Order Oracles

AAAI 2021 · Optimization › Nonconvex and smooth optimization · approach: Nonconvex minimax and constrained methods · 2 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use approximate gradient directions from directional-preference queries in an ellipsoid methodSmooth convex optimization with a directional-preference oracle · Smooth Lipschitz convex functionsquery complexity: \tilde{\mathcal{O}}(n^{4})Helped
Infer derivative signs from comparisons and use approximate-gradient ellipsoid cutsSmooth convex optimization with a comparator oracle · Smooth Lipschitz convex functionsquery complexity: \tilde{\mathcal{O}}(n^{4})Helped
Estimate gradients from value queries along basis directions and use ellipsoid cutsSmooth convex optimization with a value oracle · Smooth Lipschitz convex functionsquery complexity: \tilde{\mathcal{O}}(n^3)No clear effect
Estimate gradient directions from repeated noisy-value samplesSmooth convex optimization with a noisy-value oracle · Smooth Lipschitz convex functionssample complexity: \tilde{\mathcal{O}}(n^{13}/\varepsilon^{4})Hurt
Use staged gradient estimation and repeatedly query a point selected for low regretRegret-NV · Noisy-value oracle, regret over T queriesregret: \tilde{\mathcal{O}}( n^{3.75} \radiusofset{C} \sqrt{\beta \sigma} T^{0.75})Mixed

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