Geodesic
Variational Inequalities and Regularity Properties of Closed Sets in Hilbert Spaces
Journal of convex analysis, Tome 8 (2001) no. 1, pp. 197-222.

Voir la notice de l'article provenant de la source Heldermann Verlag

Some properties of closed sets which generalize concepts of Convex Analysis are compared and characterized. Some of them have a global character and are concerned with controlling the lack of monotonicity of the Frechet subdifferential of the indicator function. The connection with the local structure of sets in finite as well as in infinite dimensional spaces is also investigated. Special emphasis is given to a class of sets satisfying an external sphere condition, with locally uniform radius.
Classification : 49J52, 46C05
Mots-clés : Nonsmooth analysis, Bouligand normal cones, Clarke normal cones 
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     author = {G. Colombo and V. V. Goncharov},
     title = {Variational {Inequalities} and {Regularity} {Properties} of {Closed} {Sets} in {Hilbert} {Spaces}},
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     pages = {197--222},
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G. Colombo; V. V. Goncharov. Variational Inequalities and Regularity Properties of Closed Sets in Hilbert Spaces. Journal of convex analysis, Tome 8 (2001) no. 1, pp. 197-222. http://geodesic.mathdoc.fr/item/JCA_2001_8_1_JCA_2001_8_1_a8/