Publication: Extra-Optimal Methods for Solving Ill-Posed Problems: Survey of Theory and Examples
Дата
2020
Авторы
Leonov, A. S.
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© 2020, Pleiades Publishing, Ltd.Abstract: A new direction in methods for solving ill-posed problems, namely, the theory of regularizing algorithms with approximate solutions of extra-optimal quality is surveyed. A distinctive feature of these methods is that they are optimal not only in the order of accuracy of resulting approximate solutions, but also with respect to a user-specified quality functional. Such functionals can be specified, for example, as an a posteriori estimate of the quality (accuracy) of approximate solutions, a posteriori estimates of various linear functionals of these solutions, and estimates of their mathematical entropy and multidimensional variations of chosen types. The relationship between regularizing algorithms that are extra-optimal and optimal in the order of quality is studied. Issues concerning the practical derivation of a posteriori estimates for the quality of approximate solutions are addressed, and numerical algorithms for finding such estimates are described. The exposition is illustrated by results of numerical experiments.
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Leonov, A. S. Extra-Optimal Methods for Solving Ill-Posed Problems: Survey of Theory and Examples / Leonov, A.S. // Computational Mathematics and Mathematical Physics. - 2020. - 60. - № 6. - P. 960-986. - 10.1134/S0965542520060068
URI
https://www.doi.org/10.1134/S0965542520060068
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https://openrepository.mephi.ru/handle/123456789/22141
https://www.scopus.com/record/display.uri?eid=2-s2.0-85088859227&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000555591800005
https://openrepository.mephi.ru/handle/123456789/22141