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A sequential adaptive regularisation using cubics algorithm for solving nonlinear equality constrained optimization

Yonggang Pei (), Shaofang Song () and Detong Zhu ()
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Yonggang Pei: Henan Normal University
Shaofang Song: Henan Normal University
Detong Zhu: Shanghai Normal University

Computational Optimization and Applications, 2023, vol. 84, issue 3, No 10, 1005-1033

Abstract: Abstract The adaptive regularisation algorithm using cubics (ARC) is initially proposed for unconstrained optimization. ARC has excellent convergence properties and complexity. In this paper, we extend ARC to solve nonlinear equality constrained optimization and propose a sequential adaptive regularisation using cubics algorithm inspired by sequential quadratic programming (SQP) methods. In each iteration of our method, the trial step is computed via composite-step approach, i.e., it is decomposed into the sum of normal step and tangential step. By means of reduced-Hessian approach, a new ARC subproblem for nonlinear equality constrained optimization is constructed to compute the tangential step, which can supply sufficient decrease required in the proposed algorithm. Once the trial step is obtained, the ratio of the penalty function reduction to the model function reduction is calculated to determine whether the trial point is accepted. The global convergence of the algorithm is investigated under some mild assumptions. Preliminary numerical experiments are reported to show the performance of the proposed algorithm.

Keywords: Nonlinear optimization; Constrained optimization; Adaptive regularization with cubics; Global convergence; 49M37; 65K05; 65K10; 90C30 (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s10589-022-00449-w

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