An extension of the variational inequality approach for nonlinear ill-posed problems

Details An extension of the variational inequality approach for nonlinear ill-posed problems An extension of the variational inequality approach for nonlinear ill-posed problems

2009-09-28

arxiv.org/abs/0909.5093v1

Mathematics

Numerical Analysis

17 pages, submitted to "Journal of Integral Equations and Applications"

Scientific paper

Convergence rates results for Tikhonov regularization of nonlinear ill-posed operator equations in abstract function spaces require the handling of both smoothness conditions imposed on the solution and structural conditions expressing the character of nonlinearity. Recently, the distinguished role of variational inequalities holding on some level sets was outlined for obtaining convergence rates results. When lower rates are expected such inequalities combine the smoothness properties of solution and forward operator in a sophisticated manner. In this paper, using a Banach space setting we are going to extend the variational inequality approach from H\"older rates to more general rates including the case of logarithmic convergence rates.

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