Lower and upper bounds for the perturbat
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Jiu Ding
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Article
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2004
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Elsevier Science
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English
β 202 KB
Let X and Y be Banach spaces, and let T : X -Y be a bounded linear operator with closed range. In this paper, we give optimal lower and upper bounds for the perturbation of consistent operator equations Tz = 1/, and more general least-squares problems in Hilbert spaces.