| Article ID: | iaor19921899 | 
| Country: | Germany | 
| Volume: | 22 | 
| Start Page Number: | 869 | 
| End Page Number: | 883 | 
| Publication Date: | Nov 1991 | 
| Journal: | Optimization | 
| Authors: | Pappalardo M. | 
The purpose of this paper is to establish a necessary optimality condition for a certain class of nondifferentiable extremum problems. The analysis is developed via image-space approach and the result generalizes, in finite-dimensional spaces, the classical results concerning locally Lipschitz mathematical programming.