In the current article, we focus on hyperconvex metric spaces and survey the existence of best proximity points and optimal pair of fixed points for cyclic and noncyclic relatively u-continuous mappings which are r-condensing by applying a suitable measure of noncompactness. The method of the proof of our main results relies on the fact that every hyperconvex metric space <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13663_2025_807_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="51" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mo stretchy="false">(</mo> <mi mathvariant="script">M</mi> <mo>,</mo> <mi>d</mi> <mo stretchy="false">)</mo> </math></EquationSource> <EquationSource Format="TEX">$(\mathcal {M}, d)$</EquationSource> </InlineEquation> can be isometrically embedded into the Banach space <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13663_2025_807_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="54" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <msup> <mi>ℓ</mi> <mi mathvariant="normal">∞</mi> </msup> <mo stretchy="false">(</mo> <mi mathvariant="script">M</mi> <mo stretchy="false">)</mo> </math></EquationSource> <EquationSource Format="TEX">$\ell ^{\infty}(\mathcal {M})$</EquationSource> </InlineEquation>. Another important tool which will be used in the proof of the existence theorems is to show that the proximal pair of every nonempty and admissible pair in a hyperconvex metric space <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13663_2025_807_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi mathvariant="script">M</mi> </math></EquationSource> <EquationSource Format="TEX">$\mathcal {M}$</EquationSource> </InlineEquation> is also nonempty and admissible.

Best proximity results in metric spaces endowed with a hyperconvex structure

期刊论文
出版模式：

开放获取
发表日期：

2025年9月19日

查看全文

Moosa Gabeleh,
Jack Markin

摘要

In the current article, we focus on hyperconvex metric spaces and survey the existence of best proximity points and optimal pair of fixed points for cyclic and noncyclic relatively u-continuous mappings which are r-condensing by applying a suitable measure of noncompactness. The method of the proof of our main results relies on the fact that every hyperconvex metric space $(M, d)$ $(\mathcal {M}, d)$ can be isometrically embedded into the Banach space $ℓ^{\infty} (M)$ $\ell ^{\infty}(\mathcal {M})$ . Another important tool which will be used in the proof of the existence theorems is to show that the proximal pair of every nonempty and admissible pair in a hyperconvex metric space $M$ $\mathcal {M}$ is also nonempty and admissible.