Sums,couplings, and completions of almost Pontryagin spaces |
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| Authors: | Henk de Snoo Harald Woracek |
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| Institution: | 1. Johann Bernoulli Institute for Mathematics and Computing Science, University of Groningen, P.O. Box 407, 9700 AK Groningen, Netherlands;2. Institut für Analysis und Scientific Computing, Technische Universität Wien, Wiedner Hauptstraße 8–10/101, A-1040 Wien, Austria |
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| Abstract: | An almost Pontryagin space can be written as the direct and orthogonal sum of a Hilbert space, a finite-dimensional anti-Hilbert space, and a finite-dimensional neutral space. In this paper orthogonal sums of almost Pontryagin spaces and completions to almost Pontryagin spaces are studied. |
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