
This detailed paper proves algebraically a conjecture by \textit{M. Fiedler} and \textit{T. L. Markham} [Linear Algebra Appl, 101, 1--8 (1988; Zbl 0648.15009)] for the Hadamard product of a matrix and its inverse by refining Fiedler's and Markham's lower bounds for the minimum eigenvalue of that product. The main results are well demonstrated by an example at the end of the paper, in which the author's show their bounds and their improvement over Fiedler's and Markham's.
Perron-Frobenius theorem, Numerical Analysis, Hadamard product, \(M\)-matrix, Algebra and Number Theory, eigenvalue, Fiedler and Markham's conjecture, Eigenvalue, inverse \(M\)-matrix, Inequalities involving eigenvalues and eigenvectors, Fiedler and Markham’s conjecture, Discrete Mathematics and Combinatorics, Theory of matrix inversion and generalized inverses, Geometry and Topology, M-matrix, Inverse, doubly stochastic matrices
Perron-Frobenius theorem, Numerical Analysis, Hadamard product, \(M\)-matrix, Algebra and Number Theory, eigenvalue, Fiedler and Markham's conjecture, Eigenvalue, inverse \(M\)-matrix, Inequalities involving eigenvalues and eigenvectors, Fiedler and Markham’s conjecture, Discrete Mathematics and Combinatorics, Theory of matrix inversion and generalized inverses, Geometry and Topology, M-matrix, Inverse, doubly stochastic matrices
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