Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6418467 | Journal of Mathematical Analysis and Applications | 2014 | 15 Pages |
Abstract
We show that for a given bornology β on a Banach space X the following “liminf” formulaliminfxâ²â¶CxTβ(C;xâ²)âTc(C;x) holds true for every closed set CâX and any xâC, provided that the space XÃX is âβ-trusted. Here Tβ(C;x) and Tc(C;x) denote the β-tangent cone and the Clarke tangent cone to C at x. The trustworthiness includes spaces with an equivalent β-differentiable norm or more generally with a Lipschitz β-differentiable bump function. As a consequence, we show that for the Fréchet bornology, this “liminf” formula characterizes in fact the Asplund property of X. We use our results to obtain new characterizations of Tβ-pseudoconvexity of X.
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Physical Sciences and Engineering
Mathematics
Analysis
Authors
Abderrahim Jourani, Taron Zakaryan,