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Partial isometry of the partitioned matrix. (Chinese. English summary) Zbl 1374.15013

Summary: Under the condition of disjointness of the column space and row space, and according to the definition of the partial isometry, the partial isometry of two kinds of the partitioned matrices is studied. Several necessary and sufficient conditions for partial isometry of its submatrices are obtained when the partitioned matrix is partial isometry matrix.

MSC:

15A12 Conditioning of matrices
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