<p>In this paper, we focus on the existence results of radial solutions for a Dirichlet boundary value problem of the following augmented <i>k</i>-Hessian equation: <Equation ID="Equ10"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_Equ10.gif" Format="GIF" Height="43" Rendition="HTML" Resolution="72" Type="Linedraw" Width="316" /> </MediaObject> <EquationSource Format="TEX">\(\begin{aligned} \left\{ \begin{array}{ll} S_{k } (D^{2} u + \alpha I ) = \lambda b(\vert x \vert ) f(-u ) , &amp; \quad i n \ \Omega , \\ u = 0 , &amp; \quad on \ \partial \Omega , \end{array} \right. \end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <mfenced open="{"> <mrow> <mtable> <mtr> <mtd columnalign="left"> <mrow> <msub> <mi>S</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <msup> <mi>D</mi> <mn>2</mn> </msup> <mi>u</mi> <mo>+</mo> <mi>α</mi> <mi>I</mi> <mo stretchy="false">)</mo> </mrow> <mo>=</mo> <mi>λ</mi> <mi>b</mi> <mrow> <mo stretchy="false">(</mo> <mo stretchy="false">|</mo> <mi>x</mi> <mo stretchy="false">|</mo> <mo stretchy="false">)</mo> </mrow> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mo>-</mo> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mspace width="1em" /> <mi>i</mi> <mi>n</mi> <mspace width="4pt" /> <mi mathvariant="normal">Ω</mi> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <mi>u</mi> <mo>=</mo> <mn>0</mn> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mspace width="1em" /> <mi>o</mi> <mi>n</mi> <mspace width="4pt" /> <mi>∂</mi> <mi mathvariant="normal">Ω</mi> <mo>,</mo> </mrow> </mtd> </mtr> </mtable> </mrow> </mfenced> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>where <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\( \Omega \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Ω</mi> </math></EquationSource> </InlineEquation> is an open unit ball in <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="28" /> </InlineMediaObject> <EquationSource Format="TEX">\( \mathbb {R}^{N},\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>N</mi> </msup> <mo>,</mo> </mrow> </math></EquationSource> </InlineEquation> <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="101" /> </InlineMediaObject> <EquationSource Format="TEX">\( S_{k } (D^{2} u + \alpha I ) \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>S</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <msup> <mi>D</mi> <mn>2</mn> </msup> <mi>u</mi> <mo>+</mo> <mi>α</mi> <mi>I</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> is an augmented <i>k</i>-Hessian operator, <i>k</i> is an integer, <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq4.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="125" /> </InlineMediaObject> <EquationSource Format="TEX">\( 1 \le k \le N &lt; 2 k,\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>1</mn> <mo>≤</mo> <mi>k</mi> <mo>≤</mo> <mi>N</mi> <mo>&lt;</mo> <mn>2</mn> <mi>k</mi> <mo>,</mo> </mrow> </math></EquationSource> </InlineEquation> <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq5.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\( \alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation> is a constant <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq6.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="55" /> </InlineMediaObject> <EquationSource Format="TEX">\(\left( \alpha \ne 0 \right) \)</EquationSource> <EquationSource Format="MATHML"><math> <mfenced close=")" open="("> <mi>α</mi> <mo>≠</mo> <mn>0</mn> </mfenced> </math></EquationSource> </InlineEquation>, <i>I</i> is the unit matrix, <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq7.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\( \lambda \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>λ</mi> </math></EquationSource> </InlineEquation> is a positive parameter, <i>b</i> and <i>f</i> are continuous functions. The augmented term <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq8.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="23" /> </InlineMediaObject> <EquationSource Format="TEX">\(\alpha I\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>α</mi> <mi>I</mi> </mrow> </math></EquationSource> </InlineEquation> in this paper can be positive or negative. It follows from the Guo–Krasnosel’skii fixed point theorem that there is at least one radial solution to the Dirichlet problem of the augmented <i>k</i>-Hessian equation for certain <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12190_2025_2410_Article_IEq9.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="42" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda &gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>λ</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>.</p>

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Research on the Dirichlet problem for a class of augmented k-Hessian equation

  • Shu Feng,
  • Ling Mi

摘要

In this paper, we focus on the existence results of radial solutions for a Dirichlet boundary value problem of the following augmented k-Hessian equation: \(\begin{aligned} \left\{ \begin{array}{ll} S_{k } (D^{2} u + \alpha I ) = \lambda b(\vert x \vert ) f(-u ) , & \quad i n \ \Omega , \\ u = 0 , & \quad on \ \partial \Omega , \end{array} \right. \end{aligned}\) S k ( D 2 u + α I ) = λ b ( | x | ) f ( - u ) , i n Ω , u = 0 , o n Ω , where \( \Omega \) Ω is an open unit ball in \( \mathbb {R}^{N},\) R N , \( S_{k } (D^{2} u + \alpha I ) \) S k ( D 2 u + α I ) is an augmented k-Hessian operator, k is an integer, \( 1 \le k \le N < 2 k,\) 1 k N < 2 k , \( \alpha \) α is a constant \(\left( \alpha \ne 0 \right) \) α 0 , I is the unit matrix, \( \lambda \) λ is a positive parameter, b and f are continuous functions. The augmented term \(\alpha I\) α I in this paper can be positive or negative. It follows from the Guo–Krasnosel’skii fixed point theorem that there is at least one radial solution to the Dirichlet problem of the augmented k-Hessian equation for certain \(\lambda >0\) λ > 0 .