<p>Let <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13660_2025_3275_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="111" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi>F</mi> <mo stretchy="false">(</mo> <mi>a</mi> <mo>,</mo> <mi>b</mi> <mo>;</mo> <mi>a</mi> <mo>+</mo> <mi>b</mi> <mo>;</mo> <mi>x</mi> <mo stretchy="false">)</mo> </math></EquationSource> <EquationSource Format="TEX">$F(a,b; a+b;x)$</EquationSource> </InlineEquation> be the Gaussian hypergeometric function and <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13660_2025_3275_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="268" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <msub> <mi>F</mi> <mi>p</mi> </msub> <mo stretchy="false">(</mo> <mi>x</mi> <mo stretchy="false">)</mo> <mo>=</mo> <msup> <mrow> <mo stretchy="false">(</mo> <mn>1</mn> <mo>−</mo> <mi>x</mi> <mo stretchy="false">)</mo> </mrow> <mi>p</mi> </msup> <mo>exp</mo> <mo stretchy="false">(</mo> <mi>F</mi> <mo stretchy="false">(</mo> <mi>a</mi> <mo>,</mo> <mi>b</mi> <mo>;</mo> <mi>a</mi> <mo>+</mo> <mi>b</mi> <mo>;</mo> <mi>x</mi> <mo stretchy="false">)</mo> <mo stretchy="false">)</mo> </math></EquationSource> <EquationSource Format="TEX">$F_{p}(x)=(1-x)^{p}\exp ({F(a,b;a+b;x)})$</EquationSource> </InlineEquation>. This article aims to extend the work of Zhen-Hang Yang and Jing-Feng Tian to a more generalized case involving zero-balanced Gaussian hypergeometric functions. We prove the sufficient and necessary conditions for the absolute monotonicity of <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13660_2025_3275_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="67" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mo>−</mo> <msup> <mrow> <mo stretchy="false">(</mo> <mo>ln</mo> <msub> <mi>F</mi> <mi>p</mi> </msub> <mo stretchy="false">)</mo> </mrow> <mo>′</mo> </msup> </math></EquationSource> <EquationSource Format="TEX">$-(\ln F_{p})'$</EquationSource> </InlineEquation>, <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13660_2025_3275_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="36" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mo>ln</mo> <msub> <mi>F</mi> <mi>p</mi> </msub> </math></EquationSource> <EquationSource Format="TEX">$\ln F_{p}$</EquationSource> </InlineEquation>, <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13660_2025_3275_Article_IEq5.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="51" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mo>−</mo> <msup> <mrow> <mo stretchy="false">(</mo> <msub> <mi>F</mi> <mi>p</mi> </msub> <mo stretchy="false">)</mo> </mrow> <mo>′</mo> </msup> </math></EquationSource> <EquationSource Format="TEX">$-(F_{p})'$</EquationSource> </InlineEquation> and <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13660_2025_3275_Article_IEq6.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <msub> <mi>F</mi> <mi>p</mi> </msub> </math></EquationSource> <EquationSource Format="TEX">$F_{p}$</EquationSource> </InlineEquation>. These results ultimately yield several new inequalities involving the zero-balanced Gaussian hypergeometric functions.</p>

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Absolutely monotonic functions involving the zero-balanced Gaussian hypergeometric functions with applications

  • Chuanlong Sun,
  • Zixuan Wang,
  • Tiren Huang

摘要

Let F ( a , b ; a + b ; x ) $F(a,b; a+b;x)$ be the Gaussian hypergeometric function and F p ( x ) = ( 1 x ) p exp ( F ( a , b ; a + b ; x ) ) $F_{p}(x)=(1-x)^{p}\exp ({F(a,b;a+b;x)})$ . This article aims to extend the work of Zhen-Hang Yang and Jing-Feng Tian to a more generalized case involving zero-balanced Gaussian hypergeometric functions. We prove the sufficient and necessary conditions for the absolute monotonicity of ( ln F p ) $-(\ln F_{p})'$ , ln F p $\ln F_{p}$ , ( F p ) $-(F_{p})'$ and F p $F_{p}$ . These results ultimately yield several new inequalities involving the zero-balanced Gaussian hypergeometric functions.