 
                                                                                | Article ID: | iaor2000505 | 
| Country: | China | 
| Volume: | 11 | 
| Issue: | 1 | 
| Start Page Number: | 61 | 
| End Page Number: | 68 | 
| Publication Date: | Jan 1998 | 
| Journal: | Journal of Systems Science and Complexity | 
| Authors: | Li Y. | 
| Keywords: | duality | 
This paper deals with the nonconical nonsmooth multiobjective programming problem. The generalized directional derivate of a mapping with respect to a binary relation and the derivate of a binary relation are introduced and used as basic tools. The optimality conditions and duality theorems are proved.