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- W4297433757 abstract "A key observation underlying this paper is the fact that the range invariance condition for convergence of regularization methods for nonlinear ill-posed operator equations -- such as coefficient identification in partial differential equiations (PDE)s from boundary observations -- can often be achieved by extending the seached for parameter in the sense of allowing it to depend on additional variables. This clearly counteracts unique identifiability of the parameter, though. The second key idea of this paper is now to restore the original restricted dependency of the parameter by penalization. This is shown to lead to convergence of variational (Tikhonov type) and iterative (Newton type) regularization methods. We concretize the abstract convergence analysis in a framework typical of parameter identification in PDEs in a reduced and an all-at-once setting. This is further illustrated by three examples of coefficient identification from boundary observations in elliptic and time-dependent PDEs." @default.
- W4297433757 created "2022-09-28" @default.
- W4297433757 creator A5011058927 @default.
- W4297433757 date "2022-09-26" @default.
- W4297433757 modified "2023-09-27" @default.
- W4297433757 title "Convergence guarantees for coefficient reconstruction in PDEs from boundary measurements by variational and Newton type methods via range invariance" @default.
- W4297433757 doi "https://doi.org/10.48550/arxiv.2209.12596" @default.
- W4297433757 hasPublicationYear "2022" @default.
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