<p>To hyperbolize a metric space (<i>X</i>,&#xa0;<i>d</i>), we propose a new one-point hyperbolic metric <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40315_2025_595_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\Gamma _p\)</EquationSource> </InlineEquation> and investigate its average. We demonstrate the Gromov hyperbolicity of these metrics and compare the newly constructed metric <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40315_2025_595_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(\Gamma _p\)</EquationSource> </InlineEquation> to several existing metrics including the metric <i>d</i>. We investigate the quasiconformality of the identity map <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40315_2025_595_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="149" /> </InlineMediaObject> <EquationSource Format="TEX">\(\operatorname {id}: (X,d)\rightarrow (X, \Gamma _p)\)</EquationSource> </InlineEquation> and analyze the relationship between the identity map and bilipschitzian mappings.</p>

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A New One-Point Hyperbolic Metric and its Average

  • Chongying Fan,
  • Yingqing Xiao,
  • Ting Zeng

摘要

To hyperbolize a metric space (Xd), we propose a new one-point hyperbolic metric \(\Gamma _p\) and investigate its average. We demonstrate the Gromov hyperbolicity of these metrics and compare the newly constructed metric \(\Gamma _p\) to several existing metrics including the metric d. We investigate the quasiconformality of the identity map \(\operatorname {id}: (X,d)\rightarrow (X, \Gamma _p)\) and analyze the relationship between the identity map and bilipschitzian mappings.