Summary
The numerical solution of ill-posed problems by projection methods is considered. Regularization is carried out simply by choosing an optimal discretization parameter. It is shown by asymptotic estimates and by numerical examples that this kind of regularization is as efficient as the method of Tikhonov and Phillips.
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Natterer, F. Regularisierung schlecht gestellter Probleme durch Projektionsverfahren. Numer. Math. 28, 329–341 (1977). https://doi.org/10.1007/BF01389972
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DOI: https://doi.org/10.1007/BF01389972