Unbounded GNS representations of a*-alge
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J. -P. Antoine; S. Γta
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Article
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1989
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Springer
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English
β 375 KB
Al~traet. Given a \*-algebra 9.I and a linear, nonpositive definite, functional on it, the GNS construction yields a representation of 9./ in an indefinite metric space. We show that, if the functional satisfies a suitable condition, expressed in terms of a conditional expectation on 2, then the rep