We introduce a new notion of subdifferential, which we call Q-subdifferential, for functions defined on subsets of normed spaces. The Q-subdifferential is a subset of the Greenbeg-Pierskalla quasi-subdifferential and is therefore useful in quasiconvex analysis. © Heldermann Verlag.
|Journal||Journal of Convex Analysis|
|Publication status||Published - 1 Dec 1999|
- Fréchet subdifferential
- Greenberg-Pierskalla quasi-subdifferential