<p>In this paper, we study an attraction-repulsion chemotaxis with logistic damping, <Equation ID="Equ77"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_Equ77.gif" Format="GIF" Height="44" Rendition="HTML" Resolution="72" Type="Linedraw" Width="432" /> </MediaObject> <EquationSource Format="TEX">\(\begin{aligned} u_{t}&amp;=\nabla \cdot (D(u)\nabla u)-\nabla \cdot (\chi u \nabla v) +\nabla \cdot (\xi u \nabla w)+au-bu^{\eta },\\ 0&amp;=\Delta v+\alpha u-\beta v, \quad 0=\Delta w+\gamma u-\delta w, \end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <msub> <mi>u</mi> <mi>t</mi> </msub> </mtd> <mtd columnalign="left"> <mrow> <mo>=</mo> <mi mathvariant="normal">∇</mi> <mo>·</mo> <mrow> <mo stretchy="false">(</mo> <mi>D</mi> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mi mathvariant="normal">∇</mi> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mo>-</mo> <mi mathvariant="normal">∇</mi> <mo>·</mo> <mrow> <mo stretchy="false">(</mo> <mi>χ</mi> <mi>u</mi> <mi mathvariant="normal">∇</mi> <mi>v</mi> <mo stretchy="false">)</mo> </mrow> <mo>+</mo> <mi mathvariant="normal">∇</mi> <mo>·</mo> <mrow> <mo stretchy="false">(</mo> <mi>ξ</mi> <mi>u</mi> <mi mathvariant="normal">∇</mi> <mi>w</mi> <mo stretchy="false">)</mo> </mrow> <mo>+</mo> <mi>a</mi> <mi>u</mi> <mo>-</mo> <mi>b</mi> <msup> <mi>u</mi> <mi>η</mi> </msup> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="right"> <mrow> <mrow /> <mn>0</mn> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mo>=</mo> <mi mathvariant="normal">Δ</mi> <mi>v</mi> <mo>+</mo> <mi>α</mi> <mi>u</mi> <mo>-</mo> <mi>β</mi> <mi>v</mi> <mo>,</mo> <mspace width="1em" /> <mn>0</mn> <mo>=</mo> <mi mathvariant="normal">Δ</mi> <mi>w</mi> <mo>+</mo> <mi>γ</mi> <mi>u</mi> <mo>-</mo> <mi>δ</mi> <mi>w</mi> <mo>,</mo> </mrow> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>for <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq1.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="88" /> </InlineMediaObject> <EquationSource Format="TEX">\(x\in \Omega , t&gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>x</mi> <mo>∈</mo> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>t</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>, subject to null Neumann boundary conditions, where <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="114" /> </InlineMediaObject> <EquationSource Format="TEX">\(D(u)\ge c_{D}u^{m-1}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>D</mi> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mo>≥</mo> <msub> <mi>c</mi> <mi>D</mi> </msub> <msup> <mi>u</mi> <mrow> <mi>m</mi> <mo>-</mo> <mn>1</mn> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation>. When the repulsion prevails over the attraction (<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq3.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="TEX">\(\xi \gamma &gt;\chi \alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ξ</mi> <mi>γ</mi> <mo>&gt;</mo> <mi>χ</mi> <mi>α</mi> </mrow> </math></EquationSource> </InlineEquation>), the problem admits a globally bounded solution even if the logistic source was weak. When the attraction dominates the repulsion (<InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq4.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="TEX">\(\xi \gamma &lt;\chi \alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ξ</mi> <mi>γ</mi> <mo>&lt;</mo> <mi>χ</mi> <mi>α</mi> </mrow> </math></EquationSource> </InlineEquation>), the problem still possesses a globally bounded solution provided the logistic absorption is sufficiently strong in the sense of <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq5.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="42" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta &gt;2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>η</mi> <mo>&gt;</mo> <mn>2</mn> </mrow> </math></EquationSource> </InlineEquation>, or the diffusion is sufficiently strong in the sense of <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq6.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="47" /> </InlineMediaObject> <EquationSource Format="TEX">\(m&gt;1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>m</mi> <mo>&gt;</mo> <mn>1</mn> </mrow> </math></EquationSource> </InlineEquation> for the classical logistic source and suitable coefficient of absorption (<InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq7.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="42" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta =2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>η</mi> <mo>=</mo> <mn>2</mn> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq8.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="45" /> </InlineMediaObject> <EquationSource Format="TEX">\(b=b^*\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>b</mi> <mo>=</mo> <msup> <mi>b</mi> <mo>∗</mo> </msup> </mrow> </math></EquationSource> </InlineEquation>), or the coefficient of absorption is sufficiently large (<InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq9.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\(b&gt;b^{*}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>b</mi> <mo>&gt;</mo> <mmultiscripts> <mi>b</mi> <mrow /> <mrow> <mrow /> <mo>∗</mo> </mrow> </mmultiscripts> </mrow> </math></EquationSource> </InlineEquation>) for the classical logistic source, or the diffusion is sufficiently strong in the sense of <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq10.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="96" /> </InlineMediaObject> <EquationSource Format="TEX">\(m&gt;2- {2}/{n}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>m</mi> <mo>&gt;</mo> <mn>2</mn> <mo>-</mo> <mn>2</mn> <mo stretchy="false">/</mo> <mi>n</mi> </mrow> </math></EquationSource> </InlineEquation> even if the logistic damping was weak. In the critical case <InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq11.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="TEX">\(\xi \gamma =\chi \alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ξ</mi> <mi>γ</mi> <mo>=</mo> <mi>χ</mi> <mi>α</mi> </mrow> </math></EquationSource> </InlineEquation>, strong logistic damping or strong diffusion (<InlineEquation ID="IEq12"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq12.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="43" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta \ge 2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>η</mi> <mo>≥</mo> <mn>2</mn> </mrow> </math></EquationSource> </InlineEquation> or <InlineEquation ID="IEq13"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq13.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="96" /> </InlineMediaObject> <EquationSource Format="TEX">\(m&gt;2-2/n\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>m</mi> <mo>&gt;</mo> <mn>2</mn> <mo>-</mo> <mn>2</mn> <mo stretchy="false">/</mo> <mi>n</mi> </mrow> </math></EquationSource> </InlineEquation>) lead to the global boundedness of solutions. For <InlineEquation ID="IEq14"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq14.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="69" /> </InlineMediaObject> <EquationSource Format="TEX">\(D(u)\equiv 1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>D</mi> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> <mo>≡</mo> <mn>1</mn> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq15"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq15.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="43" /> </InlineMediaObject> <EquationSource Format="TEX">\(n\ge 2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>n</mi> <mo>≥</mo> <mn>2</mn> </mrow> </math></EquationSource> </InlineEquation>, the convergence rates of global solutions are established in <InlineEquation ID="IEq16"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41808_2025_331_Article_IEq16.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="26" /> </InlineMediaObject> <EquationSource Format="TEX">\(L^\infty \)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>L</mi> <mi>∞</mi> </msup> </math></EquationSource> </InlineEquation>-norm. The result answers the left question in <i>J. Math. Anal. Appl.</i> 455 (2017) 650–679.</p>

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Convergence rates in an attraction-repulsion chemotaxis of parabolic-elliptic-elliptic type

  • Bingchen Liu,
  • Mengzhen Dong,
  • Jingwen Cui

摘要

In this paper, we study an attraction-repulsion chemotaxis with logistic damping, \(\begin{aligned} u_{t}&=\nabla \cdot (D(u)\nabla u)-\nabla \cdot (\chi u \nabla v) +\nabla \cdot (\xi u \nabla w)+au-bu^{\eta },\\ 0&=\Delta v+\alpha u-\beta v, \quad 0=\Delta w+\gamma u-\delta w, \end{aligned}\) u t = · ( D ( u ) u ) - · ( χ u v ) + · ( ξ u w ) + a u - b u η , 0 = Δ v + α u - β v , 0 = Δ w + γ u - δ w , for \(x\in \Omega , t>0\) x Ω , t > 0 , subject to null Neumann boundary conditions, where \(D(u)\ge c_{D}u^{m-1}\) D ( u ) c D u m - 1 . When the repulsion prevails over the attraction ( \(\xi \gamma >\chi \alpha \) ξ γ > χ α ), the problem admits a globally bounded solution even if the logistic source was weak. When the attraction dominates the repulsion ( \(\xi \gamma <\chi \alpha \) ξ γ < χ α ), the problem still possesses a globally bounded solution provided the logistic absorption is sufficiently strong in the sense of \(\eta >2\) η > 2 , or the diffusion is sufficiently strong in the sense of \(m>1\) m > 1 for the classical logistic source and suitable coefficient of absorption ( \(\eta =2\) η = 2 and \(b=b^*\) b = b ), or the coefficient of absorption is sufficiently large ( \(b>b^{*}\) b > b ) for the classical logistic source, or the diffusion is sufficiently strong in the sense of \(m>2- {2}/{n}\) m > 2 - 2 / n even if the logistic damping was weak. In the critical case \(\xi \gamma =\chi \alpha \) ξ γ = χ α , strong logistic damping or strong diffusion ( \(\eta \ge 2\) η 2 or \(m>2-2/n\) m > 2 - 2 / n ) lead to the global boundedness of solutions. For \(D(u)\equiv 1\) D ( u ) 1 and \(n\ge 2\) n 2 , the convergence rates of global solutions are established in \(L^\infty \) L -norm. The result answers the left question in J. Math. Anal. Appl. 455 (2017) 650–679.