Abstract
Notion of metrically regular property and certain types of point-based approximations are used for solving the nonsmooth generalized equation f (x) + ℱ(x) ∋ 0, where X and Y are Banach spaces, and U is an open subset of X, f : U → Y is a nonsmooth function and ℱ : X ⇉ Y is a set-valued mapping with closed graph. We introduce a confined Newton-type method for solving the above nonsmooth generalized equation and analyze the semilocal and local convergence of this method. Specifically, under the point-based approximation of f on U and metrically regular property of f + ℱ, we present quadratic rate of convergence of this method. Furthermore, superlinear rate of convergence of this method is provided under the conditions that f admits p-point-based approximation on U and f + ℱ is metrically regular. An example of nonsmooth functions that have p-point-based approximation is given. Moreover, a numerical experiment is given which illustrates the theoretical result.
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Acknowledgements
The first author was supported by CAS-President International Fellowship Initiative (PIFI), Chinese Academy of Sciences, Beijing, China. The second author was supported by National Natural Science Foundation of China (Grants Nos. 11688101 and 11331012). The authors thank the anonymous referees for their insightful comments and constructive suggestions, which improved the initial versions of this manuscript.
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Rashid, M.H., Yuan, Yx. Metrically regular mappings and its application to convergence analysis of a confined Newton-type method for nonsmooth generalized equations. Sci. China Math. 63, 39–60 (2020). https://doi.org/10.1007/s11425-019-9757-0
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DOI: https://doi.org/10.1007/s11425-019-9757-0
Keywords
- set-valued mappings
- generalized equations
- metrically regular mapping
- semilocal convergence
- point-based approximation