2 papers
math.RA1998
Z-Pencils
J. J. McDonald, D. D. Olesky, H. Schneider +2
The matrix pencil (A,B) = {tB-A | t \in C} is considered under the assumptions that A is entrywise nonnegative and B-A is a nonsingular M-matrix. As t varies in [0,1], the Z-matric…
math.RA1998
Inverse tridiagonal Z-matrices
J. J. McDonald, R. Nabben, M. Neumann +2
In this paper, we consider matrices whose inverses are tridiagonal Z--matrices. Based on a characterization of symmetric tridiagonal matrices by Gantmacher and Krein, we show that…