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- W2065820861 abstract "A real matrix A has a signed generalized inverse (or signed GI), if the sign pattern of its generalized inverse A+ is uniquely determined by the sign pattern of A. The notion of matrices having signed GI’s is a generalization of the well known notion of strong SNS matrices (or S2NS matrices). Sharp bounds, and characterization of equality, for the number of nonzero entries of S2NS matrices of order n are given. Then sharp bounds, and characterization of equality, for the number of nonzero entries of m×n matrices with signed GI’s are given." @default.
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- W2065820861 date "2003-11-01" @default.
- W2065820861 modified "2023-10-14" @default.
- W2065820861 title "Number of nonzero entries of S2NS matrices and matrices with signed generalized inverses" @default.
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- W2065820861 doi "https://doi.org/10.1016/s0024-3795(03)00428-2" @default.
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