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On sums of \(k\)-\(EP\) matrices. (English) Zbl 1007.15019
Summary: Necessary and sufficient conditions for the sums of \(k\)-EP matrices to be \(k\)-EP are discussed. As an application it is shown that sum and parallel sum of parallel summable \(k\)-EP matrices are \(k\)-EP.
MSC:
15B57 Hermitian, skew-Hermitian, and related matrices
15A09 Theory of matrix inversion and generalized inverses
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