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JOURNALS // Sibirskii Zhurnal Vychislitel'noi Matematiki // Archive

Sib. Zh. Vychisl. Mat., 2010 Volume 13, Number 4, Pages 375–386 (Mi sjvm413)

This article is cited in 12 papers

New methods for localizing discontinuities of a noisy function

T. V. Antonova

Institute of Mathematics and Mechanics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: For a problem of localizing the singularities (discontinuities of the first kind) of a noisy function in $L_p$ ($1\le p<\infty$), new classes of regularizing methods are constructed. These methods determine the number of discontinuities and approximate their positions. Also, upper and lower bound of the localizing singularities and the separability threshold, is obtain. It is proved that the methods are order-optimal by accuracy as well as separability on some classes of functions with discontinuities.

Key words: ill-posed problems, localization of singularities, discontinuities of the first kind, regularizing method, separability threshold.

UDC: 517.988.68

Received: 29.01.2010
Revised: 10.03.2010


 English version:
Numerical Analysis and Applications, 2010, 3:4, 306–316

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