Hostname: page-component-77c89778f8-gvh9x Total loading time: 0 Render date: 2024-07-17T14:38:07.013Z Has data issue: false hasContentIssue false

Generic Gateaux differentiability via smooth perturbations

Published online by Cambridge University Press:  17 April 2009

Pando Gr Georgiev
Affiliation:
Department of Mathematics and InformaticsUniversity of Sofia5 James Bourchier Blvd.1126 SofiaBulgaria
Nadia P. Zlateva
Affiliation:
Department of Mathematics and InformaticsUniversity of Sofia5 James Bourchier Blvd.1126 SofiaBulgaria
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We prove that in a Banach space with a Lipschitz uniformly Gateaux smooth bump function, every continuous function which is directionally differentiable on a dense Gδ subset of the space, is Gateaux differentiable on a dense Gδ subset of the space. Applications of this result are given.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1997

References

[1]Borwein, J.M. and Preiss, D., ‘A smooth variational principle with applications to subdifferentiability and to differentiability of convex functions’, Trans. Amer. Math. Soc. 303 (1987), 517527.CrossRefGoogle Scholar
[2]Deville, R., Godefroy, G. and Zizler, V., ‘A smooth variational principle with applications to Hamilton-Jacobi equations in infinite dimensions’, J. Funct. Anal. 111 (1993), 197212.CrossRefGoogle Scholar
[3]Ekeland, I., ‘Nonconvex minimization problems’, Bull. Amer. Math. Soc. 1 (1979), 443474.CrossRefGoogle Scholar
[4]Ekeland, I. and Lebourg, G., ‘Generic Frechet differentiability and perturbed optimization problems in Banach spaces’, Trans. Amer. Math. Soc. 224 (1976), 193216.Google Scholar
[5]Fabian, M. and Preiss, D., ‘On intermediate differentiability of Lipschitz functions on certain spaces’, Proc. Amer. Math. Soc. 113 (1991), 733740.CrossRefGoogle Scholar
[6]Georgiev, P.G., ‘The smooth variational principle and generic differentiability’, Bull. Austral. Math. Soc. 43 (1991), 169175.Google Scholar
[7]Kuratowski, K., Topology I (Academic Press, New York and London, 1966).Google Scholar
[8]Zajicek, L., ‘A generalization of an Ekeland-Lebourg theorem and the differentiability of distance functions’, in Proc. 11-th Winter School on Abstract Analysis, Suppl. Rend. Circolo Mat. di Palermo, Ser. II 3, 1984.Google Scholar
[9]Zhivkov, N.V., ‘Generic Gateaux differentiability of directionally differentiable mappings’, Rev. Roumaine Math. Pures Appl. 32 (1987), 179188.Google Scholar