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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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