| Article ID: | iaor20003726 |
| Country: | Singapore |
| Volume: | 16 |
| Issue: | 1 |
| Start Page Number: | 113 |
| End Page Number: | 124 |
| Publication Date: | May 1999 |
| Journal: | Asia-Pacific Journal of Operational Research |
| Authors: | Zeng Renying |
| Keywords: | duality, invexity |
In this paper we use the concepts of (