| Article ID: | iaor19921940 |
| Country: | Germany |
| Volume: | 22 |
| Start Page Number: | 845 |
| End Page Number: | 854 |
| Publication Date: | Jan 1991 |
| Journal: | Optimization |
| Authors: | Dietrich H. |
Through a suitable application of Toland’s duality theory to certain nonconvex and nonsmooth problems one obtains an unbounded minimization problem with Fréchet-differentiable cost function as dual problem and one can establish a gradient projection method for the solution of these problems.