Testing Unconstrained Optimization Software
ACM Transactions on Mathematical Software (TOMS)
On the local convergence of a derivative-free algorithm for least-squares minimization
Computational Optimization and Applications
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We propose a new self-adaptive Levenberg-Marquardt algorithm for the system of nonlinear equations F(x) = 0. The Levenberg-Marquardt parameter is chosen as the product of 驴Fk驴驴 with 驴 being a positive constant, and some function of the ratio between the actual reduction and predicted reduction of the merit function. Under the local error bound condition which is weaker than the nonsingularity, we show that the Levenberg-Marquardt method converges superlinearly to the solution for 驴驴 (0, 1), while quadratically for 驴驴 [1, 2]. Numerical results show that the new algorithm performs very well for the nonlinear equations with high rank deficiency.