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arXiv 1508.07652math.FA
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Takahashi的凸度量空间上函数的凸性及其应用

A convexity of functions on convex metric spaces of Takahashi and applications

Ahmed A. Abdelhakim

摘要:

我们快速回顾并作出一些评论的概念凸性在度量空间由于高桥。然后我们引入了基于凸结构的函数凸性的概念,称之为$W-$凸性。$W-$凸函数推广了线性空间上的凸函数。我们讨论说明性的例子(严格)$ W-$凸函数,并致力于本文的主要部分证明各种性质,使他们非常适合与经典理论的凸分析。最后,我们将所得结果应用于度量投影问题和不动点理论。

英文摘要:

We quickly review and make some comments on the concept of convexity in metric spaces due to Takahashi. Then we introduce a concept of convex structure based convexity to functions on these spaces and refer to it as $W-$convexity. $W-$convex functions generalize convex functions on linear spaces. We discuss illustrative examples of (strict) $ W-$convex functions and dedicate the major part of this paper to proving a variety of properties that make them fit in very well with the classical theory of convex analysis. Finally, we apply some of our results to the metric projection problem and fixed point theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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