| Article ID: | iaor19961420 |
| Country: | Netherlands |
| Volume: | 65 |
| Issue: | 3 |
| Start Page Number: | 327 |
| End Page Number: | 335 |
| Publication Date: | Mar 1993 |
| Journal: | European Journal of Operational Research |
| Authors: | Komlsi S. |
First order approximations as abstract generalized derivatives are studied in this paper. In case of quasiconvex first order approximations the quasisubdifferential is introduced and Kuhn-Tucker type necessary optimality conditions are formulated by its help.