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An \(n\times n\) matrix of linear functionals of \(C^{*}\)-algebras - MaRDI portal

An \(n\times n\) matrix of linear functionals of \(C^{*}\)-algebras (Q1608156)

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scientific article; zbMATH DE number 1779097
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An \(n\times n\) matrix of linear functionals of \(C^{*}\)-algebras
scientific article; zbMATH DE number 1779097

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    An \(n\times n\) matrix of linear functionals of \(C^{*}\)-algebras (English)
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    12 August 2002
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    Summary: We show that any bounded matrix of linear functionals \([ f_{ ij}]:M_{n} (A)\to M_{n} ({\mathbb C})\) has a representation \(f_{ ij} (a)=\langle T\pi (a)x_{j},x_{i}\rangle\), \(a\in A\), \(i,j=1,2,\dots,n\), for some representation \(\pi\) on a Hilbert space \(K\) and an \(n\) vectors \(x _{1,}x_{2},\dots,x_{n}\) in \(K\).
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    bounded matrix of linear functionals
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    representation
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