ZO-SAH accelerates zeroth-order optimization by estimating and using subspace Hessians via quadratic fitting with evaluation reuse, achieving faster convergence on logistic regression and neural network benchmarks.
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Subspace-based Approximate Hessian Method for Zeroth-Order Optimization
ZO-SAH accelerates zeroth-order optimization by estimating and using subspace Hessians via quadratic fitting with evaluation reuse, achieving faster convergence on logistic regression and neural network benchmarks.