| Article ID: | iaor20102792 |
| Volume: | 36 |
| Issue: | 1 |
| Start Page Number: | 4 |
| End Page Number: | 6 |
| Publication Date: | Jan 2008 |
| Journal: | Operations Research Letters |
| Authors: | Cornujols Grard, Bonami Pierre |
In 1988, Nemhauser and Wolsey introduced the concept of mixed integer rounding (MIR) inequality for mixed integer linear programs. In 1998, Wolsey gave another definition of MIR inequalities. This note points out that the natural concepts of MIR closures derived from these two definitions are distinct. Dash, Günlük and Lodi made the same observation independently.