Test spaces,dacey spaces,and completeness of inner product spaces |
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Authors: | Anatolij Dvurečenskij Sylvia Pulmannová |
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Institution: | (1) Mathematical Institute, Slovak Academy of Sciences, tefánikova 49, SK-814 73 Bratislava, Slovakia |
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Abstract: | We show that a test space consisting of the unit sphere of a real or complex inner product spaceS and of the set all maximal orthonormal systems inS, is algebraic iffS is Dacey or, equivalently, iffS is complete. In addition, we present another completeness criterion.This research is supported by the grant G-368 of the Slovak Academy of Sciences, Slovakia. |
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Keywords: | Primary: 46C15 Secondary: 81P10 03G12 |
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