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News/Revisiting Zeroth-Order Hessian Approximation: A Single-Step Policy Optimization Lens
arxiv
PublishedJune 1, 2026 at 4:00 AM

Revisiting Zeroth-Order Hessian Approximation: A Single-Step Policy Optimization Lens

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arXiv:2605.30960v1 Announce Type: new Abstract: Accurate Zeroth-Order (ZO) Hessian estimation is a cornerstone of derivative-free methods, essential for tasks such as bilevel optimization, Bayesian inference, and uncertainty quantification. However, obtaining a complete suite of low-variance estimat

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