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\(K\)-frames for Krein spaces - MaRDI portal

\(K\)-frames for Krein spaces (Q2680621)

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\(K\)-frames for Krein spaces
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    \(K\)-frames for Krein spaces (English)
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    4 January 2023
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    The authors introduce and study \(K\)-frames for Krein spaces. A necessary condition, a sufficient condition, and a necessary and sufficient condition for \(K\)-frames and \(K\)-dual Bessel sequence for Krein spaces are obtained. Moreover, they give some results for \(K\)-frames in Krein spaces arising from a non-regular \(W\)-metric.
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    \(K\)-frames
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    \(K\)-dual Bessel sequences
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    Krein spaces
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    non-regular Gram operator
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