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A theorem concerning certain sign symmetric matrices whose inverses are Morishima |
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| Authors: | Gerry Wiener |
| Affiliation: | Mathematics Department University of Colorado Denver, Colorado, USA |
| Abstract: | Suppose A is an invertible sign symmetric matrix whose associated digraph D(A) is a tree. Then A-1 will be Morishima iff a?? ? 0 for all interior points ? in D(A). A-1 will be anti-Morishima iff a?? ? 0 for all interior points ? in D(A). |
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