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Remarks on Naimark's duality

Wojciech Czaja

math.FAarXiv:math/0410348

Abstract

We present an extension of Naimark's duality principle which states that complete systems in a Hilbert space are projections of ω-linearly independent systems of elements of an ambient Hilbert space. This result is presented in the context of other known extensions of Naimark's theorem.

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