Spectral points of type π₊ and type π_- of closed operators in indefinite inner product spaces

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• Friedrich Philipp
• Carsten Trunk

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• Primary
• 47A10
• 47B50
• 46C20
• 47A55

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• indefinite inner product
• selfadjoint operator
• spectrum of positive and negative type
• spectrum of type π₊ and π_-
• local spectral function
• perturbation theory

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