Abstract
We consider the theory of operators in spaces with indefinite metric. Strict plus-operators acting between two Krein spaces are considered. A construction showing that, under certain conditions, a strict plus-operator can be considered as a bistrict plus-operator without loss of generality is given.
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Translated from Ukrains’ki˘ı Matematychny˘ı Visnyk, Vol. 11, No. 1, pp. 1–14, January–February, 2014.
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Azizov, T.Y., Senderov, V.A. & Khatskevich, V.A. Strict and bistrict plus-operators. J Math Sci 200, 295–304 (2014). https://doi.org/10.1007/s10958-014-1913-0
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DOI: https://doi.org/10.1007/s10958-014-1913-0