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Singularly perturbed normal operators

We present a generalization of definition'of-singularly perturbed operators to the case of normal operators. To do this, we use an idea of normal expansions of a prenormal operator and prove the relation for resolvents of normal expansions similar to the M. Krein relation for resolvents of...

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Bibliographic Details
Date:	1999
Main Authors:	Dudkin, M. Ye., Дудкін, М. Є.
Format:	Article
Language:	Ukrainian English
Published:	Institute of Mathematics, NAS of Ukraine 1999
Online Access:	https://umj.imath.kiev.ua/index.php/umj/article/view/4695
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Journal Title:	Ukrains’kyi Matematychnyi Zhurnal
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