<p>In this paper, we study the following biharmonic Hartree problem <Equation ID="Equ128"> <EquationSource Format="TEX">\(\begin{aligned} \left\{ \begin{array}{ll} \Delta ^2 u=\left( \int _{\Omega }\frac{ u^{2^{*}_{\alpha }}(y)}{|x-y|^{\alpha }}\textrm{d}y\right) u^{2^{*}_{\alpha }-1}+\varepsilon u~ &amp; \quad \textrm{in}~~ \Omega ,\\ u=\Delta u=0 ~ &amp; \quad \textrm{on} ~~ \partial \Omega , \end{array} \right. \end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <mfenced open="{"> <mrow> <mtable> <mtr> <mtd columnalign="left"> <mrow> <msup> <mi mathvariant="normal">Δ</mi> <mn>2</mn> </msup> <mi>u</mi> <mo>=</mo> <mfenced close=")" open="("> <msub> <mo>∫</mo> <mi mathvariant="normal">Ω</mi> </msub> <mfrac> <mrow> <msup> <mi>u</mi> <msubsup> <mn>2</mn> <mi>α</mi> <mrow> <mrow /> <mo>∗</mo> </mrow> </msubsup> </msup> <mrow> <mo stretchy="false">(</mo> <mi>y</mi> <mo stretchy="false">)</mo> </mrow> </mrow> <msup> <mrow> <mo stretchy="false">|</mo> <mi>x</mi> <mo>-</mo> <mi>y</mi> <mo stretchy="false">|</mo> </mrow> <mi>α</mi> </msup> </mfrac> <mtext>d</mtext> <mi>y</mi> </mfenced> <msup> <mi>u</mi> <mrow> <msubsup> <mn>2</mn> <mi>α</mi> <mrow> <mrow /> <mo>∗</mo> </mrow> </msubsup> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>+</mo> <mi>ε</mi> <mi>u</mi> <mspace width="3.33333pt" /> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mspace width="1em" /> <mtext>in</mtext> <mspace width="3.33333pt" /> <mspace width="3.33333pt" /> <mi mathvariant="normal">Ω</mi> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <mi>u</mi> <mo>=</mo> <mi mathvariant="normal">Δ</mi> <mi>u</mi> <mo>=</mo> <mn>0</mn> <mspace width="3.33333pt" /> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mspace width="1em" /> <mtext>on</mtext> <mspace width="3.33333pt" /> <mspace width="3.33333pt" /> <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"> <EquationSource Format="TEX">\(N\ge 8\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>N</mi> <mo>≥</mo> <mn>8</mn> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\alpha \in (0,8)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>α</mi> <mo>∈</mo> <mo stretchy="false">(</mo> <mn>0</mn> <mo>,</mo> <mn>8</mn> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(2^{*}_{\alpha }=\frac{2N-\alpha }{N-4}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mn>2</mn> <mi>α</mi> <mrow> <mrow /> <mo>∗</mo> </mrow> </msubsup> <mo>=</mo> <mfrac> <mrow> <mn>2</mn> <mi>N</mi> <mo>-</mo> <mi>α</mi> </mrow> <mrow> <mi>N</mi> <mo>-</mo> <mn>4</mn> </mrow> </mfrac> </mrow> </math></EquationSource> </InlineEquation> is the upper critical exponent with respect to the Hardy-Littlewood-Sobolev inequality, <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\Omega \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Ω</mi> </math></EquationSource> </InlineEquation> is a bounded smooth domain in <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\mathbb {R}^{N}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>N</mi> </msup> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(\varepsilon &gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ε</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation> is a small parameter. By applying the reduction arguments, we prove that the above problem has a family of solutions <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(u_{\varepsilon }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>u</mi> <mi>ε</mi> </msub> </math></EquationSource> </InlineEquation> concentrating around the critical point of Robin function as <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(\varepsilon \rightarrow 0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ε</mi> <mo stretchy="false">→</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>.</p>

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Single-Peak Solutions for a Biharmonic Hartree Equation

  • Mingchao Chen,
  • Wenjing Chen

摘要

In this paper, we study the following biharmonic Hartree problem \(\begin{aligned} \left\{ \begin{array}{ll} \Delta ^2 u=\left( \int _{\Omega }\frac{ u^{2^{*}_{\alpha }}(y)}{|x-y|^{\alpha }}\textrm{d}y\right) u^{2^{*}_{\alpha }-1}+\varepsilon u~ & \quad \textrm{in}~~ \Omega ,\\ u=\Delta u=0 ~ & \quad \textrm{on} ~~ \partial \Omega , \end{array} \right. \end{aligned}\) Δ 2 u = Ω u 2 α ( y ) | x - y | α d y u 2 α - 1 + ε u in Ω , u = Δ u = 0 on Ω , where \(N\ge 8\) N 8 , \(\alpha \in (0,8)\) α ( 0 , 8 ) , \(2^{*}_{\alpha }=\frac{2N-\alpha }{N-4}\) 2 α = 2 N - α N - 4 is the upper critical exponent with respect to the Hardy-Littlewood-Sobolev inequality, \(\Omega \) Ω is a bounded smooth domain in \(\mathbb {R}^{N}\) R N and \(\varepsilon >0\) ε > 0 is a small parameter. By applying the reduction arguments, we prove that the above problem has a family of solutions \(u_{\varepsilon }\) u ε concentrating around the critical point of Robin function as \(\varepsilon \rightarrow 0\) ε 0 .