Spectral points of definite type and type π for linear operators and relations in Krein spaces
نویسندگان
چکیده
منابع مشابه
Spectral points of definite type and type π for linear operators and relations in Krein spaces
Spectral points of positive and negative type, and type π+ and type π− for closed linear operators and relations in Krein spaces are introduced with the help of approximative eigensequences. The main objective of the paper is to study these sign type properties in the non-selfadjoint case under various kinds of perturbations, e.g. compact perturbations and perturbations small in the gap metric....
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ژورنال
عنوان ژورنال: Journal of the London Mathematical Society
سال: 2011
ISSN: 0024-6107
DOI: 10.1112/jlms/jdq098