<p>This paper is concerned with the quasilinear attraction-repulsion chemotaxis system with flux limitation, <Equation ID="Equ60"> <EquationSource Format="TEX">\(\begin{aligned} {\left\{ \begin{array}{ll} u_t=\nabla \cdot \left( (u+1)^{m-1}\nabla u -\dfrac{\chi u(u+1)^{p-2}}{(1+|\nabla v|^2)^{k}}\nabla v +\dfrac{\xi u(u+1)^{q-2}}{(1+|\nabla w|^2)^{\ell }}\nabla w\right) , \\ 0=\Delta v+\alpha u^{\lambda }-\beta v, \\ 0=\Delta w+\gamma u^{\theta }-\delta w \end{array}\right. } \end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <mfenced open="{"> <mrow> <mtable> <mtr> <mtd columnalign="left"> <mrow> <msub> <mi>u</mi> <mi>t</mi> </msub> <mo>=</mo> <mi mathvariant="normal">∇</mi> <mo>·</mo> <mfenced close=")" open="("> <msup> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo>+</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> <mrow> <mi>m</mi> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mi mathvariant="normal">∇</mi> <mi>u</mi> <mo>-</mo> <mstyle displaystyle="true" scriptlevel="0"> <mfrac> <mrow> <mi>χ</mi> <mi>u</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo>+</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> <mrow> <mi>p</mi> <mo>-</mo> <mn>2</mn> </mrow> </msup> </mrow> <mrow> <msup> <mrow> <mo stretchy="false">(</mo> <mn>1</mn> <mo>+</mo> <mo stretchy="false">|</mo> <mi mathvariant="normal">∇</mi> <mi>v</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> <msup> <mrow> <mo stretchy="false">)</mo> </mrow> <mi>k</mi> </msup> </mrow> </mfrac> </mstyle> <mi mathvariant="normal">∇</mi> <mi>v</mi> <mo>+</mo> <mstyle displaystyle="true" scriptlevel="0"> <mfrac> <mrow> <mi>ξ</mi> <mi>u</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo>+</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> <mrow> <mi>q</mi> <mo>-</mo> <mn>2</mn> </mrow> </msup> </mrow> <mrow> <msup> <mrow> <mo stretchy="false">(</mo> <mn>1</mn> <mo>+</mo> <mo stretchy="false">|</mo> <mi mathvariant="normal">∇</mi> <mi>w</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> <msup> <mrow> <mo stretchy="false">)</mo> </mrow> <mi>ℓ</mi> </msup> </mrow> </mfrac> </mstyle> <mi mathvariant="normal">∇</mi> <mi>w</mi> </mfenced> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <mn>0</mn> <mo>=</mo> <mi mathvariant="normal">Δ</mi> <mi>v</mi> <mo>+</mo> <mi>α</mi> <msup> <mi>u</mi> <mi>λ</mi> </msup> <mo>-</mo> <mi>β</mi> <mi>v</mi> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <mn>0</mn> <mo>=</mo> <mi mathvariant="normal">Δ</mi> <mi>w</mi> <mo>+</mo> <mi>γ</mi> <msup> <mi>u</mi> <mi>θ</mi> </msup> <mo>-</mo> <mi>δ</mi> <mi>w</mi> </mrow> </mtd> </mtr> </mtable> </mrow> </mfenced> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>in an open ball in <InlineEquation ID="IEq1"> <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> <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\((n \ge 2)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <mi>n</mi> <mo>≥</mo> <mn>2</mn> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>, where <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(m, p, q \in \mathbb {R}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>m</mi> <mo>,</mo> <mi>p</mi> <mo>,</mo> <mi>q</mi> <mo>∈</mo> <mi mathvariant="double-struck">R</mi> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(k, \ell \ge 0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>k</mi> <mo>,</mo> <mi>ℓ</mi> <mo>≥</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(0&lt;\lambda \le 1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo>&lt;</mo> <mi>λ</mi> <mo>≤</mo> <mn>1</mn> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(0&lt;\theta \le 1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo>&lt;</mo> <mi>θ</mi> <mo>≤</mo> <mn>1</mn> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(\chi , \xi , \alpha , \beta , \gamma , \delta &gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>χ</mi> <mo>,</mo> <mi>ξ</mi> <mo>,</mo> <mi>α</mi> <mo>,</mo> <mi>β</mi> <mo>,</mo> <mi>γ</mi> <mo>,</mo> <mi>δ</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation> are constants. Boundedness of solutions to this system is known only in the one-dimensional case under some conditions on the parameters and initial data. However, there is no information about the question whether boundedness can be obtained in the higher-dimensional case. The purpose of this paper is to give an answer to this question for all <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(n \ge 2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>n</mi> <mo>≥</mo> <mn>2</mn> </mrow> </math></EquationSource> </InlineEquation>.</p>

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Boundedness in a quasilinear attraction-repulsion chemotaxis system with flux limitation

  • Yutaro Chiyo,
  • Kazuki Hasegawa,
  • Tomomi Yokota

摘要

This paper is concerned with the quasilinear attraction-repulsion chemotaxis system with flux limitation, \(\begin{aligned} {\left\{ \begin{array}{ll} u_t=\nabla \cdot \left( (u+1)^{m-1}\nabla u -\dfrac{\chi u(u+1)^{p-2}}{(1+|\nabla v|^2)^{k}}\nabla v +\dfrac{\xi u(u+1)^{q-2}}{(1+|\nabla w|^2)^{\ell }}\nabla w\right) , \\ 0=\Delta v+\alpha u^{\lambda }-\beta v, \\ 0=\Delta w+\gamma u^{\theta }-\delta w \end{array}\right. } \end{aligned}\) u t = · ( u + 1 ) m - 1 u - χ u ( u + 1 ) p - 2 ( 1 + | v | 2 ) k v + ξ u ( u + 1 ) q - 2 ( 1 + | w | 2 ) w , 0 = Δ v + α u λ - β v , 0 = Δ w + γ u θ - δ w in an open ball in \(\mathbb {R}^n\) R n \((n \ge 2)\) ( n 2 ) , where \(m, p, q \in \mathbb {R}\) m , p , q R , \(k, \ell \ge 0\) k , 0 , \(0<\lambda \le 1\) 0 < λ 1 , \(0<\theta \le 1\) 0 < θ 1 , \(\chi , \xi , \alpha , \beta , \gamma , \delta >0\) χ , ξ , α , β , γ , δ > 0 are constants. Boundedness of solutions to this system is known only in the one-dimensional case under some conditions on the parameters and initial data. However, there is no information about the question whether boundedness can be obtained in the higher-dimensional case. The purpose of this paper is to give an answer to this question for all \(n \ge 2\) n 2 .