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A Class of M-matrices whose Graphs are Trees |
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| Authors: | Servet Martí nez Jaime San Martí n Xiao-Dong Zhang |
| Abstract: | In this article, we characterize generalized ultrametric matrices whose inverses are tree-diagonal. This generalizes the results of McDonald, Nabben, Neumann, Schneider and Tsatsomeros for tri-diagonal matrices. |
| Keywords: | Generalized ultrametric matrix Tree Inverse M-matrix M-matrix AMS Subject Classifications: 15A09 05C50 15A57 |
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