Abstract <p>This paper studies the uniqueness of a nonconstant meromorphic function <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="TEX">\(f(z)\)</EquationSource> <!--ContMath2470046Wang-m1--> </InlineEquation> of hyperorder strictly less than 1 concerning its differential polynomial and shift with partially shared values. Especially, we prove that if the differential polynomial <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="42" /> </InlineMediaObject> <EquationSource Format="TEX">\(M(f)\)</EquationSource> <!--ContMath2470046Wang-m2--> </InlineEquation> and <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq3.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="61" /> </InlineMediaObject> <EquationSource Format="TEX">\(f(z+c)\)</EquationSource> <!--ContMath2470046Wang-m3--> </InlineEquation> share <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq4.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="12" /> </InlineMediaObject> <EquationSource Format="TEX">\(a\)</EquationSource> <!--ContMath2470046Wang-m4--> </InlineEquation> IM and <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq5.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="434" /> </InlineMediaObject> <EquationSource Format="TEX">\(E(b,f(z+c))\subset E(b,M(f)),E(\infty,M(f))\subset E(\infty,f(z+c))\)</EquationSource> <!--ContMath2470046Wang-m5--> </InlineEquation> under additional assumptions, where <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq6.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="28" /> </InlineMediaObject> <EquationSource Format="TEX">\(a,b\)</EquationSource> <!--ContMath2470046Wang-m6--> </InlineEquation> are distinct finite constants and <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq7.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="73" /> </InlineMediaObject> <EquationSource Format="TEX">\(M(f)\not\equiv 0\)</EquationSource> <!--ContMath2470046Wang-m7--> </InlineEquation> is a differential polynomial in <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq8.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\(f\)</EquationSource> <!--ContMath2470046Wang-m8--> </InlineEquation> and its derivatives with constant coefficients, then <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq9.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="123" /> </InlineMediaObject> <EquationSource Format="TEX">\(M(f)\equiv f(z+c)\)</EquationSource> <!--ContMath2470046Wang-m9--> </InlineEquation> and <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11957_2025_7208_Article_IEq10.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="34" /> </InlineMediaObject> <EquationSource Format="TEX">\(f(z)\)</EquationSource> <!--ContMath2470046Wang-m10--> </InlineEquation> is a transcendental entire function.</p>

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Uniqueness of Differential Polynomials and Shifts of Meromorphic Functions Concerning Partially Shared Values

  • M.-H. Wang,
  • J.-F. Chen

摘要

Abstract

This paper studies the uniqueness of a nonconstant meromorphic function \(f(z)\) of hyperorder strictly less than 1 concerning its differential polynomial and shift with partially shared values. Especially, we prove that if the differential polynomial \(M(f)\) and \(f(z+c)\) share \(a\) IM and \(E(b,f(z+c))\subset E(b,M(f)),E(\infty,M(f))\subset E(\infty,f(z+c))\) under additional assumptions, where \(a,b\) are distinct finite constants and \(M(f)\not\equiv 0\) is a differential polynomial in \(f\) and its derivatives with constant coefficients, then \(M(f)\equiv f(z+c)\) and \(f(z)\) is a transcendental entire function.