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A note on the minimization of a Tikhonov functional with $$\ell^1$$-penalty. (English) Zbl 07220289
This paper is concerned with the minimization of a Tikhonov functional with an $$\ell^1$$ penalty, arising from sparse reconstruction. The authors propose a transformation with $$\ell^2$$ penalty and a nonlinear operator. The novelty lies in the fact that the resulting functional is a twice differentiable functional that can now be minimized using efficient second order methods, e.g., Newton’s method. The authors provide a convergence analysis of the scheme and several numerical experiments.
##### MSC:
 65J20 Numerical solutions of ill-posed problems in abstract spaces; regularization 47A52 Linear operators and ill-posed problems, regularization
TIGRA
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