| Article ID: | iaor20102866 |
| Volume: | 36 |
| Issue: | 5 |
| Start Page Number: | 647 |
| End Page Number: | 650 |
| Publication Date: | Sep 2008 |
| Journal: | Operations Research Letters |
| Authors: | Malinowska Agnieszka B |
In this work we characterize objective functions which do not change the set of efficient solutions (weakly efficient solutions, properly efficient solutions). Necessary and sufficient conditions for an objective function to be weakly nonessential (properly nonessential) are presented. We establish relations between weakly nonessential, properly nonessential and nonessential functions.