<p>In this paper, for given <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq5.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="40" /> </InlineMediaObject> <EquationSource Format="TEX">\(c&gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>c</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>, we study the existence of a couple of solution <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq6.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="169" /> </InlineMediaObject> <EquationSource Format="TEX">\((u_c,\lambda _c)\in H^1({\mathbb R}^N)\times {\mathbb R}_+\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mo stretchy="false">(</mo> <msub> <mi>u</mi> <mi>c</mi> </msub> <mo>,</mo> <msub> <mi>λ</mi> <mi>c</mi> </msub> <mo stretchy="false">)</mo> </mrow> <mo>∈</mo> <msup> <mi>H</mi> <mn>1</mn> </msup> <mrow> <mo stretchy="false">(</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>N</mi> </msup> <mo stretchy="false">)</mo> </mrow> <mo>×</mo> <msub> <mi mathvariant="double-struck">R</mi> <mo>+</mo> </msub> </mrow> </math></EquationSource> </InlineEquation> to the following Kirchhoff type problem: <Equation ID="Equ54"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_Equ54.gif" Format="GIF" Height="54" Rendition="HTML" Resolution="72" Type="Linedraw" Width="362" /> </MediaObject> <EquationSource Format="TEX">\( \left\{ \begin{array}{ll} -\left( a+b \int _{{\mathbb R}^N}|\nabla u|^2\right) \Delta u+\lambda u=f(u),\,\,\, &amp; ~x\in {\mathbb R}^N, \\ (\int _{{\mathbb R}^N}|u|^2)^{\frac{1}{2}}=c,\,\,\, &amp; \end{array} \right. \)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mfenced open="{"> <mrow> <mtable> <mtr> <mtd columnalign="left"> <mrow> <mo>-</mo> <mfenced close=")" open="("> <mi>a</mi> <mo>+</mo> <mi>b</mi> <msub> <mo>∫</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>N</mi> </msup> </msub> <msup> <mrow> <mo stretchy="false">|</mo> <mi mathvariant="normal">∇</mi> <mi>u</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> </mfenced> <mi mathvariant="normal">Δ</mi> <mi>u</mi> <mo>+</mo> <mi>λ</mi> <mi>u</mi> <mo>=</mo> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <mspace width="0.166667em" /> <mspace width="0.166667em" /> <mspace width="0.166667em" /> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mspace width="3.33333pt" /> <mi>x</mi> <mo>∈</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>N</mi> </msup> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow> <mrow /> <mo stretchy="false">(</mo> </mrow> <msub> <mo>∫</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>N</mi> </msup> </msub> <msup> <mrow> <mo stretchy="false">|</mo> <mi>u</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> <msup> <mrow> <mo stretchy="false">)</mo> </mrow> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </msup> <mo>=</mo> <mi>c</mi> <mo>,</mo> <mspace width="0.166667em" /> <mspace width="0.166667em" /> <mspace width="0.166667em" /> </mrow> </mtd> </mtr> </mtable> </mrow> </mfenced> </math></EquationSource> </Equation>where <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq7.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(N\le 3\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>N</mi> <mo>≤</mo> <mn>3</mn> </mrow> </math></EquationSource> </InlineEquation>, <i>a</i>,&#xa0; <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq8.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="39" /> </InlineMediaObject> <EquationSource Format="TEX">\(b&gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>b</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation> are constants, <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq9.gif" Format="GIF" Height="24" Rendition="HTML" Resolution="72" Type="Linedraw" Width="100" /> </InlineMediaObject> <EquationSource Format="TEX">\(f(u)\sim |u|^{\frac{8}{N}}u\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mo>∼</mo> <msup> <mrow> <mo stretchy="false">|</mo> <mi>u</mi> <mo stretchy="false">|</mo> </mrow> <mfrac> <mn>8</mn> <mi>N</mi> </mfrac> </msup> <mi>u</mi> </mrow> </math></EquationSource> </InlineEquation> is a <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(L^2\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>L</mi> <mn>2</mn> </msup> </math></EquationSource> </InlineEquation>-critical general nonlinearity. By using the scaling method and a new version of global compactness lemma, we prove that there exists <InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq11.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\(c_*&gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>c</mi> <mrow> <mrow /> <mo>∗</mo> </mrow> </msub> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation> such that the problem admits no solution for <InlineEquation ID="IEq12"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq12.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="77" /> </InlineMediaObject> <EquationSource Format="TEX">\(0&lt;c\le c_*\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo>&lt;</mo> <mi>c</mi> <mo>≤</mo> <msub> <mi>c</mi> <mrow> <mrow /> <mo>∗</mo> </mrow> </msub> </mrow> </math></EquationSource> </InlineEquation> and the problem admits at least one solution with a minimax characterization for <InlineEquation ID="IEq13"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq13.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\(c&gt;c_*\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>c</mi> <mo>&gt;</mo> <msub> <mi>c</mi> <mrow> <mrow /> <mo>∗</mo> </mrow> </msub> </mrow> </math></EquationSource> </InlineEquation>. Our main results can be viewed as an extension of [He et. al. JDE, 356:375–406, (2023)] concerning the <InlineEquation ID="IEq14"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="42985_2025_328_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(L^2\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>L</mi> <mn>2</mn> </msup> </math></EquationSource> </InlineEquation>-supercritical nonlinearity.</p>

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The existence of \(L^2\)-constrained solutions for Kirchhoff equations with \(L^2\)-critical general nonlinearity

  • Hongyu Ye,
  • Jiahui Yin

摘要

In this paper, for given \(c>0\) c > 0 , we study the existence of a couple of solution \((u_c,\lambda _c)\in H^1({\mathbb R}^N)\times {\mathbb R}_+\) ( u c , λ c ) H 1 ( R N ) × R + to the following Kirchhoff type problem: \( \left\{ \begin{array}{ll} -\left( a+b \int _{{\mathbb R}^N}|\nabla u|^2\right) \Delta u+\lambda u=f(u),\,\,\, & ~x\in {\mathbb R}^N, \\ (\int _{{\mathbb R}^N}|u|^2)^{\frac{1}{2}}=c,\,\,\, & \end{array} \right. \) - a + b R N | u | 2 Δ u + λ u = f ( u ) , x R N , ( R N | u | 2 ) 1 2 = c , where \(N\le 3\) N 3 , a \(b>0\) b > 0 are constants, \(f(u)\sim |u|^{\frac{8}{N}}u\) f ( u ) | u | 8 N u is a \(L^2\) L 2 -critical general nonlinearity. By using the scaling method and a new version of global compactness lemma, we prove that there exists \(c_*>0\) c > 0 such that the problem admits no solution for \(0<c\le c_*\) 0 < c c and the problem admits at least one solution with a minimax characterization for \(c>c_*\) c > c . Our main results can be viewed as an extension of [He et. al. JDE, 356:375–406, (2023)] concerning the \(L^2\) L 2 -supercritical nonlinearity.