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Q4303511 - MaRDI portal

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scientific article; zbMATH DE number 624985
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scientific article; zbMATH DE number 624985

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    15 December 1994
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    normal spectral approximation in a unital \(C^*\)-algebra
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    approximation by positive or self-adjoint elements and by positive contractions
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    extreme points of the convex set of all approximants
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