Abstract
This paper gives a variant trust-region method, where its radius is automatically adjusted by using the model information gathered at the current and preceding iterations. The primary aim is to decrease the number of function evaluations and solving subproblems, which increases the efficiency of the trust-region method. The next aim is to update the new radius for large-scale problems without imposing too much computational cost to the scheme. Global convergence to first-order stationary points is proved under classical assumptions. Preliminary numerical experiments on a set of test problems from the CUTEst collection show that the presented method is promising for solving unconstrained optimization problems.

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References
Ahookhosh, M., Amini, K.: A nonmonotone trust region method with adaptive radius for unconstrained optimization. Comput. Math. Appl. 60, 411–422 (2010)
Ahookhosh, M., Esmaeili, H., Kimiaei, M.: An effective trust-region-based approach for symmetric nonlinear systems. Int. J. Comput. Math. 90(3), 671–690 (2013)
Amini, K., Ahookhosh, M.: A hybrid of adjustable trust-region and nonmonotone algorithms for unconstrained optimization. Appl. Math. Modell. 38, 2601–2612 (2014)
Conn, A.R., Gould, N.I.M., Toint, PhL: Trust Region Methods. Society for Industrial and Applied Mathematics. SIAM, Philadelphia (2000)
Dolan, E., Moré, J.J.: Benchmarking optimization software with performance profiles. Math. Program. 91, 201–213 (2002)
Gould, N.I.M., Orban, D., Toint, Ph.L.: CUTEst: a constrained and unconstrained testing environment with safe threads for mathematical optimization. Comput. Optim. Appl. 60, 545–557 (2015)
Gould, N.I.M., Orban, D., Sartenaer, A., Toint, PhL: Sensitivity of trust region algorithms to their parameters. Q. J. Oper. Res. 3, 227–241 (2005)
Li, D.H., Fukushima, M.: A modified BFGS method and its global convergence in nonconvex minimization. J. Comput. Appl. Math. 129, 15–35 (2001)
Nocedal, J., Wright, S.J.: Numerical Optimization. Springer, NewYork (2006)
Sartenaer, A.: Automatic determination of an initial trust region in nonlinear programming. SIAM J. Sci. Comput. 18(6), 1788–1803 (1997)
Schnabel, R.B., Eskow, E.: A new modified Cholesky factorization. SIAM J. Sci. Comput. 11(6), 1136–1158 (1990)
Shi, Z.J., Guo, J.H.: A new trust region method with adaptive radius. Comput. Optim. Appl. 41, 225–242 (2008)
Walmag, J.M.B., Delhez, E.J.M.: A note on trust region radius update. SIAM J. Optim. 16(2), 548–562 (2005)
Xiao, Y., Sun, H., Wang, Z.: A globally convergent BFGS method with nonmonotone line search for non-convex minimization. J. Comput. Appl. Math. 230, 95–106 (2009)
Zhang, X.S., Zhang, J.L., Liao, L.Z.: An adaptive trust region method and its convergence. Sci. China 45, 620–631 (2002)
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We are very thankful to two anonymous referees for careful reading and many useful suggestions, which improve the paper.
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Appendix
Appendix
See Table 3 for the list of test problems from the CUTEst collection.
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Kamandi, A., Amini, K. & Ahookhosh, M. An improved adaptive trust-region algorithm. Optim Lett 11, 555–569 (2017). https://doi.org/10.1007/s11590-016-1018-4
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DOI: https://doi.org/10.1007/s11590-016-1018-4