| Article ID: | iaor19981899 |
| Country: | Italy |
| Volume: | 26 |
| Issue: | 80 |
| Start Page Number: | 65 |
| End Page Number: | 80 |
| Publication Date: | Dec 1996 |
| Journal: | Ricerca Operativa |
| Authors: | Conforti Michele, Cornujols G., Kapoor A., Vukovi K. |
| Keywords: | matrices |
In this paper, we survey results and open problems about perfect, ideal and balanced matrices. These matrices appear as constraint matrices of integer programs that can be solved a linear programs for all objective functions.