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- W4379089494 abstract "In this paper, we revisit the classical problem of solving over-determined systems of nonsmooth equations numerically. We suggest a nonsmooth Levenberg--Marquardt method for its solution which, in contrast to the existing literature, does not require local Lipschitzness of the data functions. This is possible when using Newton-differentiability instead of semismoothness as the underlying tool of generalized differentiation. Conditions for fast local convergence of the method are given. Afterwards, in the context of over-determined mixed nonlinear complementarity systems, our findings are applied, and globalized solution methods, based on a residual induced by the maximum and the Fischer--Burmeister function, respectively, are constructed. The assumptions for fast local convergence are worked out and compared. Finally, these methods are applied for the numerical solution of bilevel optimization problems. We recall the derivation of a stationarity condition taking the shape of an over-determined mixed nonlinear complementarity system involving a penalty parameter, formulate assumptions for local fast convergence of our solution methods explicitly, and present results of numerical experiments. Particularly, we investigate whether the treatment of the appearing penalty parameter as an additional variable is beneficial or not." @default.
- W4379089494 created "2023-06-02" @default.
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- W4379089494 date "2023-05-31" @default.
- W4379089494 modified "2023-09-24" @default.
- W4379089494 title "A fresh look at nonsmooth Levenberg--Marquardt methods with applications to bilevel optimization" @default.
- W4379089494 doi "https://doi.org/10.48550/arxiv.2305.19870" @default.
- W4379089494 hasPublicationYear "2023" @default.
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