<p>In this paper, we consider the following nonlinear Maxwell system <Equation ID="Equ1"><EquationNumber>M</EquationNumber><EquationSource Format="MATHML"><math><mrow><mo>{</mo><mtable columnalign="left left" columnspacing="1em"><mtr><mtd><mi mathvariant="normal">∇</mi><mo>×</mo><mi mathvariant="normal">∇</mi><mo>×</mo><msub><mi>E</mi><mn>1</mn></msub><mo>−</mo><mi>λ</mi><msub><mi>E</mi><mn>1</mn></msub><mo>=</mo><mfrac><mrow><mi>∂</mi><mi>H</mi></mrow><mrow><mi>∂</mi><msub><mi>E</mi><mn>2</mn></msub></mrow></mfrac><mo stretchy="false">(</mo><mi>x</mi><mo>,</mo><msub><mi>E</mi><mn>1</mn></msub><mo>,</mo><msub><mi>E</mi><mn>2</mn></msub><mo stretchy="false">)</mo></mtd><mtd><mspace width="0.25em" /><mrow><mi>x</mi><mo>∈</mo><mi mathvariant="normal">Ω</mi></mrow></mtd></mtr><mtr><mtd><mi mathvariant="normal">∇</mi><mo>×</mo><mi mathvariant="normal">∇</mi><mo>×</mo><msub><mi>E</mi><mn>2</mn></msub><mo>−</mo><mi>λ</mi><msub><mi>E</mi><mn>2</mn></msub><mo>=</mo><mfrac><mrow><mi>∂</mi><mi>H</mi></mrow><mrow><mi>∂</mi><msub><mi>E</mi><mn>1</mn></msub></mrow></mfrac><mo stretchy="false">(</mo><mi>x</mi><mo>,</mo><msub><mi>E</mi><mn>1</mn></msub><mo>,</mo><msub><mi>E</mi><mn>2</mn></msub><mo stretchy="false">)</mo></mtd><mtd><mspace width="0.25em" /><mrow><mi>x</mi><mo>∈</mo><mi mathvariant="normal">Ω</mi></mrow></mtd></mtr><mtr><mtd><mi>ν</mi><mo>×</mo><msub><mi>E</mi><mn>1</mn></msub><mo>=</mo><mn>0</mn><mo>,</mo><mspace width="0.3em" /><mspace width="0.3em" /><mspace width="0.3em" /><mi>ν</mi><mo>×</mo><msub><mi>E</mi><mn>2</mn></msub><mo>=</mo><mn>0</mn></mtd><mtd><mspace width="0.25em" /><mrow><mi>x</mi><mo>∈</mo><mi>∂</mi><mi mathvariant="normal">Ω</mi></mrow></mtd></mtr></mtable></mrow></math></EquationSource><EquationSource Format="TEX">\( \left \{ \textstyle\begin{array}{l@{\quad}l} \nabla \times \nabla \times E_{1}-\lambda E_{1}= \frac{\partial H}{\partial E_{2}}(x,E_{1},E_{2}) &amp; \text{ $x\in \Omega $} \\ \nabla \times \nabla \times E_{2}-\lambda E_{2}= \frac{\partial H}{\partial E_{1}}(x,E_{1},E_{2}) &amp; \text{ $x\in \Omega $} \\ \nu \times E_{1} =0,~~~ \nu \times E_{2} =0&amp; \text{ $x\in \partial \Omega $} \end{array}\displaystyle \right . \)</EquationSource></Equation> on a bounded domain <InlineEquation ID="IEq1"><EquationSource Format="MATHML"><math><mi mathvariant="normal">Ω</mi><mo>⊂</mo><msup><mi mathvariant="double-struck">R</mi><mn>3</mn></msup></math></EquationSource><EquationSource Format="TEX">$\Omega \subset \mathbb{R}^{3}$</EquationSource></InlineEquation> with exterior normal <InlineEquation ID="IEq2"><EquationSource Format="MATHML"><math><mi>ν</mi><mo>:</mo><mi>∂</mi><mi mathvariant="normal">Ω</mi><mo stretchy="false">→</mo><msup><mi mathvariant="double-struck">R</mi><mn>3</mn></msup></math></EquationSource><EquationSource Format="TEX">$\nu :\partial \Omega \rightarrow \mathbb{R}^{3}$</EquationSource></InlineEquation>, <InlineEquation ID="IEq3"><EquationSource Format="MATHML"><math><msub><mi>E</mi><mn>1</mn></msub></math></EquationSource><EquationSource Format="TEX">$E_{1}$</EquationSource></InlineEquation>, <InlineEquation ID="IEq4"><EquationSource Format="MATHML"><math><msub><mi>E</mi><mn>2</mn></msub><mo>:</mo><mi mathvariant="normal">Ω</mi><mo stretchy="false">→</mo><msup><mi mathvariant="double-struck">R</mi><mn>3</mn></msup></math></EquationSource><EquationSource Format="TEX">$E_{2}:\Omega \rightarrow \mathbb{R}^{3}$</EquationSource></InlineEquation> are vectors, <InlineEquation ID="IEq5"><EquationSource Format="MATHML"><math><mi>λ</mi><mo>∈</mo><mi mathvariant="double-struck">R</mi></math></EquationSource><EquationSource Format="TEX">$\lambda \in \mathbb{R}$</EquationSource></InlineEquation> is a constant, ∇× denote the curl operator in <InlineEquation ID="IEq6"><EquationSource Format="MATHML"><math><msup><mi mathvariant="double-struck">R</mi><mn>3</mn></msup></math></EquationSource><EquationSource Format="TEX">$\mathbb{R}^{3}$</EquationSource></InlineEquation>, <InlineEquation ID="IEq7"><EquationSource Format="MATHML"><math><mi>H</mi><mo>∈</mo><msubsup><mi>C</mi><mrow><mn>0</mn></mrow><mn>1</mn></msubsup><mo stretchy="false">(</mo><mi mathvariant="normal">Ω</mi><mo>×</mo><msup><mi mathvariant="double-struck">R</mi><mn>3</mn></msup><mo>×</mo><msup><mi mathvariant="double-struck">R</mi><mn>3</mn></msup><mo>,</mo><mi mathvariant="double-struck">R</mi><mo stretchy="false">)</mo></math></EquationSource><EquationSource Format="TEX">$H\in C_{0}^{1}(\Omega \times \mathbb{R}^{3}\times \mathbb{R}^{3}, \mathbb{R})$</EquationSource></InlineEquation> is a real-valued subquadratic function. By utilizing a generalized Clark’s theorem, we establish the existence of infinitely many solutions for the sublinear Maxwell system (M).</p>

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Existence of infinitely many solutions of Maxwell system with sublinear nonlinearity

  • Xu Zhang,
  • Yanyun Wen

摘要

In this paper, we consider the following nonlinear Maxwell system M{××E1λE1=HE2(x,E1,E2)xΩ××E2λE2=HE1(x,E1,E2)xΩν×E1=0,ν×E2=0xΩ\( \left \{ \textstyle\begin{array}{l@{\quad}l} \nabla \times \nabla \times E_{1}-\lambda E_{1}= \frac{\partial H}{\partial E_{2}}(x,E_{1},E_{2}) & \text{ $x\in \Omega $} \\ \nabla \times \nabla \times E_{2}-\lambda E_{2}= \frac{\partial H}{\partial E_{1}}(x,E_{1},E_{2}) & \text{ $x\in \Omega $} \\ \nu \times E_{1} =0,~~~ \nu \times E_{2} =0& \text{ $x\in \partial \Omega $} \end{array}\displaystyle \right . \) on a bounded domain ΩR3$\Omega \subset \mathbb{R}^{3}$ with exterior normal ν:ΩR3$\nu :\partial \Omega \rightarrow \mathbb{R}^{3}$, E1$E_{1}$, E2:ΩR3$E_{2}:\Omega \rightarrow \mathbb{R}^{3}$ are vectors, λR$\lambda \in \mathbb{R}$ is a constant, ∇× denote the curl operator in R3$\mathbb{R}^{3}$, HC01(Ω×R3×R3,R)$H\in C_{0}^{1}(\Omega \times \mathbb{R}^{3}\times \mathbb{R}^{3}, \mathbb{R})$ is a real-valued subquadratic function. By utilizing a generalized Clark’s theorem, we establish the existence of infinitely many solutions for the sublinear Maxwell system (M).