| Autor: |
Cardon, David A., Nielsen, Pace P. |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Linear Algebra and its Applications, Volume 436, Issue 7, Pages 2187-2200, 2012 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.laa.2011.09.029 |
| Popis: |
Using the relationship between totally nonnegative matrices and directed acyclic weighted planar networks, we show that $2\times 2$ minors of minor matrices of totally nonnegative matrices are also nonnegative. We give a combinatorial interpretation for the minors of minor matrices in terms of the weights of families of paths in a network. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
