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A characterization of binormal matrices. (English) Zbl 1479.47008

Summary: We give a characterization of binormal operator matrices, and in particular, a description of \(n\times n\) binormal Toeplitz matrices for \(n=2,3\). Non-trivial examples of binormal matrices that are not normal are also provided.

MSC:

47A08 Operator matrices
15B05 Toeplitz, Cauchy, and related matrices
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