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arXiv · 2309.04013

An Element-wise RSAV Algorithm for Unconstrained Optimization Problems

Shiheng Zhang·Jiahao Zhang·Jie Shen·Guang Lin
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Abstract

We present a novel optimization algorithm, element-wise relaxed scalar auxiliary variable (E-RSAV), that satisfies an unconditional energy dissipation law and exhibits improved alignment between the modified and the original energy. Our algorithm features rigorous proofs of linear convergence in the convex setting. Furthermore, we present a simple accelerated algorithm that improves the linear convergence rate to super-linear in the univariate case. We also propose an adaptive version of E-RSAV with Steffensen step size. We validate the robustness and fast convergence of our algorithm through ample numerical experiments.

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Shiheng Zhang, Jiahao Zhang, Jie Shen, Guang Lin. 2023-09-07. An Element-wise RSAV Algorithm for Unconstrained Optimization Problems. https://arxiv.org/abs/2309.04013

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