<p>In this paper, we explore fractional Kirchhoff-type hyperbolic equations containing logarithmic terms, <Equation ID="Equa"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_Equa.gif" Format="GIF" Height="65" Rendition="HTML" Resolution="72" Type="Linedraw" Width="500" /> </MediaObject> <EquationSource Format="MATHML"><math> <mrow> <mo>{</mo> <mtable columnalign="left left" columnspacing="1em"> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>t</mi> <mi>t</mi> </mrow> </msub> <mo>+</mo> <msubsup> <mrow> <mo stretchy="false">[</mo> <mi>u</mi> <mo stretchy="false">]</mo> </mrow> <mi>s</mi> <mrow> <mn>2</mn> <mi>γ</mi> <mo>−</mo> <mn>2</mn> </mrow> </msubsup> <msup> <mrow> <mo stretchy="false">(</mo> <mo>−</mo> <mi mathvariant="normal">Δ</mi> <mo stretchy="false">)</mo> </mrow> <mi>s</mi> </msup> <mi>u</mi> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mo>−</mo> <mi mathvariant="normal">Δ</mi> <mo>)</mo> </mrow> <mi>s</mi> </msup> <msub> <mi>u</mi> <mi>t</mi> </msub> <mo>=</mo> <mo stretchy="false">|</mo> <mi>u</mi> <msup> <mo stretchy="false">|</mo> <mrow> <mi>b</mi> <mo>−</mo> <mn>2</mn> </mrow> </msup> <mi>u</mi> <mo>ln</mo> <mrow> <mo>|</mo> <mi>u</mi> <mo>|</mo> </mrow> <mo>,</mo> <mspace width="0.25em" /> </mtd> <mtd> <mtext>in&#xa0;</mtext> <mi mathvariant="normal">Ω</mi> <mo>×</mo> <msup> <mi mathvariant="double-struck">R</mi> <mo>+</mo> </msup> <mo>,</mo> </mtd> </mtr> <mtr> <mtd> <mi>u</mi> <mo stretchy="false">(</mo> <mo>⋅</mo> <mo>,</mo> <mn>0</mn> <mo stretchy="false">)</mo> <mo>=</mo> <msub> <mi>u</mi> <mn>0</mn> </msub> <mo>,</mo> <mspace width="0.25em" /> <mspace width="0.25em" /> <mspace width="0.25em" /> <mspace width="0.25em" /> <msub> <mi>u</mi> <mi>t</mi> </msub> <mo stretchy="false">(</mo> <mo>⋅</mo> <mo>,</mo> <mn>0</mn> <mo stretchy="false">)</mo> <mo>=</mo> <msub> <mi>u</mi> <mn>1</mn> </msub> <mo>,</mo> </mtd> <mtd> <mtext>in&#xa0;</mtext> <mi mathvariant="normal">Ω</mi> <mo>,</mo> </mtd> </mtr> <mtr> <mtd> <mi>u</mi> <mo stretchy="false">(</mo> <mi>x</mi> <mo>,</mo> <mi>t</mi> <mo stretchy="false">)</mo> <mo>=</mo> <mn>0</mn> <mo>,</mo> </mtd> <mtd> <mtext>in&#xa0;</mtext> <mo stretchy="false">(</mo> <msup> <mi mathvariant="double-struck">R</mi> <mi>N</mi> </msup> <mo>∖</mo> <mi mathvariant="normal">Ω</mi> <mo stretchy="false">)</mo> <mo>×</mo> <msubsup> <mi mathvariant="double-struck">R</mi> <mn>0</mn> <mo>+</mo> </msubsup> <mo>,</mo> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> <EquationSource Format="TEX">\(\left \{ \textstyle\begin{array}{l@{\quad}l} u_{tt} +[u]^{2\gamma -2}_{s}(-\Delta )^{s}u+{\left ( { - \Delta } \right )^{s}}{u_{t}}=|u|^{b-2}u\ln \left | u \right |,\ &amp;\text{in } \Omega \times \mathbb{R}^{+}, \\ u(\cdot ,0)=u_{0},\ \ \ \ u_{t}(\cdot ,0)=u_{1},&amp; \text{in } \Omega ,\\ u(x,t)=0,&amp; \text{in } (\mathbb{R}^{N}\setminus \Omega )\times \mathbb{R}^{+}_{0}, \end{array}\displaystyle \right .\)</EquationSource> </Equation> where <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="27" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <msub> <mrow> <mo stretchy="false">[</mo> <mi>u</mi> <mo stretchy="false">]</mo> </mrow> <mi>s</mi> </msub> </math></EquationSource> <EquationSource Format="TEX">$[u]_{s}$</EquationSource> </InlineEquation> is the Gagliardo seminorm of <i>u</i>, <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="99" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <msubsup> <mi mathvariant="double-struck">R</mi> <mn>0</mn> <mo>+</mo> </msubsup> <mo>=</mo> <mrow> <mo>[</mo> <mn>0</mn> <mo>,</mo> <mo>+</mo> <mi mathvariant="normal">∞</mi> <mo>)</mo> </mrow> </math></EquationSource> <EquationSource Format="TEX">$\mathbb{R}_{0}^{+} = \left [ {0, + \infty } \right )$</EquationSource> </InlineEquation>, <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq3.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="47" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <msup> <mrow> <mo stretchy="false">(</mo> <mo>−</mo> <mi mathvariant="normal">Δ</mi> <mo stretchy="false">)</mo> </mrow> <mi>s</mi> </msup> </math></EquationSource> <EquationSource Format="TEX">$(-\Delta )^{s}$</EquationSource> </InlineEquation> is the fractional Laplacian operator, <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi>s</mi> <mo>∈</mo> <mo stretchy="false">(</mo> <mn>0</mn> <mo>,</mo> <mn>1</mn> <mo stretchy="false">)</mo> </math></EquationSource> <EquationSource Format="TEX">$s\in (0,1)$</EquationSource> </InlineEquation>, <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq5.gif" Format="GIF" Height="24" Rendition="HTML" Resolution="72" Type="Linedraw" Width="230" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mn>2</mn> <mo>&lt;</mo> <mn>2</mn> <mi>γ</mi> <mo>&lt;</mo> <mi>b</mi> <mo>&lt;</mo> <mi>b</mi> <mo>+</mo> <mi>ε</mi> <mo>&lt;</mo> <msubsup> <mn>2</mn> <mi>s</mi> <mo>∗</mo> </msubsup> <mo>=</mo> <mfrac> <mrow> <mn>2</mn> <mi>N</mi> </mrow> <mrow> <mi>N</mi> <mo>−</mo> <mn>2</mn> <mi>s</mi> </mrow> </mfrac> </math></EquationSource> <EquationSource Format="TEX">$2&lt;2\gamma &lt;b&lt;b+\varepsilon &lt;2_{s}^{*}=\frac{2N}{N-2s}$</EquationSource> </InlineEquation> for <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq6.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="40" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi>ε</mi> <mo>&gt;</mo> <mn>0</mn> </math></EquationSource> <EquationSource Format="TEX">$\varepsilon &gt;0$</EquationSource> </InlineEquation>, <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq7.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="58" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Ω</mi> <mo>⊂</mo> <msup> <mi mathvariant="double-struck">R</mi> <mi>N</mi> </msup> </math></EquationSource> <EquationSource Format="TEX">$\Omega \subset \mathbb{R}^{N}$</EquationSource> </InlineEquation> is a bounded domain with <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="13661_2025_2004_Article_IEq8.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="MATHML"><math> <mi>N</mi> <mo>&gt;</mo> <mn>2</mn> <mi>s</mi> </math></EquationSource> <EquationSource Format="TEX">$N&gt;2s$</EquationSource> </InlineEquation>. Under reasonable assumptions, we study certain properties of solutions to wave equations. By employing the Galerkin method in conjunction with potential well theory, we obtain the global existence of solutions in the subcritical state. Furthermore, using the concavity method and some special inequalities, we prove the asymptotic behavior and blow-up of weak solutions.</p>

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On fractional order Kirchhoff hyperbolic equations with logarithmic terms

  • Yichang Xu,
  • Ning Pan

摘要

In this paper, we explore fractional Kirchhoff-type hyperbolic equations containing logarithmic terms, { u t t + [ u ] s 2 γ 2 ( Δ ) s u + ( Δ ) s u t = | u | b 2 u ln | u | , in  Ω × R + , u ( , 0 ) = u 0 , u t ( , 0 ) = u 1 , in  Ω , u ( x , t ) = 0 , in  ( R N Ω ) × R 0 + , \(\left \{ \textstyle\begin{array}{l@{\quad}l} u_{tt} +[u]^{2\gamma -2}_{s}(-\Delta )^{s}u+{\left ( { - \Delta } \right )^{s}}{u_{t}}=|u|^{b-2}u\ln \left | u \right |,\ &\text{in } \Omega \times \mathbb{R}^{+}, \\ u(\cdot ,0)=u_{0},\ \ \ \ u_{t}(\cdot ,0)=u_{1},& \text{in } \Omega ,\\ u(x,t)=0,& \text{in } (\mathbb{R}^{N}\setminus \Omega )\times \mathbb{R}^{+}_{0}, \end{array}\displaystyle \right .\) where [ u ] s $[u]_{s}$ is the Gagliardo seminorm of u, R 0 + = [ 0 , + ) $\mathbb{R}_{0}^{+} = \left [ {0, + \infty } \right )$ , ( Δ ) s $(-\Delta )^{s}$ is the fractional Laplacian operator, s ( 0 , 1 ) $s\in (0,1)$ , 2 < 2 γ < b < b + ε < 2 s = 2 N N 2 s $2<2\gamma <b<b+\varepsilon <2_{s}^{*}=\frac{2N}{N-2s}$ for ε > 0 $\varepsilon >0$ , Ω R N $\Omega \subset \mathbb{R}^{N}$ is a bounded domain with N > 2 s $N>2s$ . Under reasonable assumptions, we study certain properties of solutions to wave equations. By employing the Galerkin method in conjunction with potential well theory, we obtain the global existence of solutions in the subcritical state. Furthermore, using the concavity method and some special inequalities, we prove the asymptotic behavior and blow-up of weak solutions.