<p>This paper is devoted to a quasilinear preytaxis model with modified Leslie-Gower function and prey-induced acceleration <Equation ID="Equ58"> <EquationSource Format="TEX">\(\begin{aligned} {\left\{ \begin{array}{ll} u_{t}=\nabla (\phi (u)\nabla u)-\nabla (\psi (u){\textbf {w}})+u(a-\frac{u}{r_{1}+v}),&amp; x\in \Omega ,t \in (0,\infty ),\\ v_{t}=d_v\Delta v+v(1-v)-\frac{uv}{r_{2}+v},&amp; x\in \Omega ,t \in (0,\infty ),\\ {\textbf {w}}_t=d_w\Delta {\textbf {w}}+\gamma \nabla v,&amp; x\in \Omega ,t\in (0,\infty ),\\ \end{array}\right. } \end{aligned}\)</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> <mrow> <mo stretchy="false">(</mo> <mi>ϕ</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> <mrow> <mo stretchy="false">(</mo> <mi>ψ</mi> <mrow> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> </mrow> <mi mathvariant="bold">w</mi> <mo stretchy="false">)</mo> </mrow> <mo>+</mo> <mi>u</mi> <mrow> <mo stretchy="false">(</mo> <mi>a</mi> <mo>-</mo> <mfrac> <mi>u</mi> <mrow> <msub> <mi>r</mi> <mn>1</mn> </msub> <mo>+</mo> <mi>v</mi> </mrow> </mfrac> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>t</mi> <mo>∈</mo> <mo stretchy="false">(</mo> <mn>0</mn> <mo>,</mo> <mi>∞</mi> <mo stretchy="false">)</mo> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <msub> <mi>v</mi> <mi>t</mi> </msub> <mo>=</mo> <msub> <mi>d</mi> <mi>v</mi> </msub> <mi mathvariant="normal">Δ</mi> <mi>v</mi> <mo>+</mo> <mi>v</mi> <mrow> <mo stretchy="false">(</mo> <mn>1</mn> <mo>-</mo> <mi>v</mi> <mo stretchy="false">)</mo> </mrow> <mo>-</mo> <mfrac> <mrow> <mi mathvariant="italic">uv</mi> </mrow> <mrow> <msub> <mi>r</mi> <mn>2</mn> </msub> <mo>+</mo> <mi>v</mi> </mrow> </mfrac> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>t</mi> <mo>∈</mo> <mo stretchy="false">(</mo> <mn>0</mn> <mo>,</mo> <mi>∞</mi> <mo stretchy="false">)</mo> <mo>,</mo> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <msub> <mi mathvariant="bold">w</mi> <mi>t</mi> </msub> <mo>=</mo> <msub> <mi>d</mi> <mi>w</mi> </msub> <mi mathvariant="normal">Δ</mi> <mi mathvariant="bold">w</mi> <mo>+</mo> <mi>γ</mi> <mi mathvariant="normal">∇</mi> <mi>v</mi> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>t</mi> <mo>∈</mo> <mo stretchy="false">(</mo> <mn>0</mn> <mo>,</mo> <mi>∞</mi> <mo stretchy="false">)</mo> <mo>,</mo> </mrow> </mtd> </mtr> </mtable> </mrow> </mfenced> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>under the homogeneous Neumann and Dirichlet initial boundary in a convex smooth bounded domain <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\Omega \subset \mathbb {R}^2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi mathvariant="normal">Ω</mi> <mo>⊂</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>2</mn> </msup> </mrow> </math></EquationSource> </InlineEquation>. The parameters satisfy <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(d_{v},d_{w},a,\gamma &gt; 0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>d</mi> <mi>v</mi> </msub> <mo>,</mo> <msub> <mi>d</mi> <mi>w</mi> </msub> <mo>,</mo> <mi>a</mi> <mo>,</mo> <mi>γ</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(r_{i}&gt;0(i=1,2)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>r</mi> <mi>i</mi> </msub> <mo>&gt;</mo> <mn>0</mn> <mrow> <mo stretchy="false">(</mo> <mi>i</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mn>2</mn> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, and the functions <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\phi (s)\ge d(s+1)^{\alpha }\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ϕ</mi> <mrow> <mo stretchy="false">(</mo> <mi>s</mi> <mo stretchy="false">)</mo> </mrow> <mo>≥</mo> <mi>d</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mi>s</mi> <mo>+</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> <mi>α</mi> </msup> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(0\le \psi (s)\le \chi s(s+1)^{\beta -1}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo>≤</mo> <mi>ψ</mi> <mrow> <mo stretchy="false">(</mo> <mi>s</mi> <mo stretchy="false">)</mo> </mrow> <mo>≤</mo> <mi>χ</mi> <mi>s</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mi>s</mi> <mo>+</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> <mrow> <mi>β</mi> <mo>-</mo> <mn>1</mn> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation> , then we can prove the problem possesses a unique global classical solution. Moreover, when <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(d_w\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>d</mi> <mi>w</mi> </msub> </math></EquationSource> </InlineEquation> is sufficiently large and certain conditions on <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(r_i\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>r</mi> <mi>i</mi> </msub> </math></EquationSource> </InlineEquation> are met, we further prove that the steady-states of the preytaxis model are globally stable.</p>

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Boundedness and stability of a quasilinear preytaxis model with modified Leslie-Gower function and prey-induced acceleration

  • Xiangling Nie,
  • Fugeng Zeng,
  • Luxu Zhou

摘要

This paper is devoted to a quasilinear preytaxis model with modified Leslie-Gower function and prey-induced acceleration \(\begin{aligned} {\left\{ \begin{array}{ll} u_{t}=\nabla (\phi (u)\nabla u)-\nabla (\psi (u){\textbf {w}})+u(a-\frac{u}{r_{1}+v}),& x\in \Omega ,t \in (0,\infty ),\\ v_{t}=d_v\Delta v+v(1-v)-\frac{uv}{r_{2}+v},& x\in \Omega ,t \in (0,\infty ),\\ {\textbf {w}}_t=d_w\Delta {\textbf {w}}+\gamma \nabla v,& x\in \Omega ,t\in (0,\infty ),\\ \end{array}\right. } \end{aligned}\) u t = ( ϕ ( u ) u ) - ( ψ ( u ) w ) + u ( a - u r 1 + v ) , x Ω , t ( 0 , ) , v t = d v Δ v + v ( 1 - v ) - uv r 2 + v , x Ω , t ( 0 , ) , w t = d w Δ w + γ v , x Ω , t ( 0 , ) , under the homogeneous Neumann and Dirichlet initial boundary in a convex smooth bounded domain \(\Omega \subset \mathbb {R}^2\) Ω R 2 . The parameters satisfy \(d_{v},d_{w},a,\gamma > 0\) d v , d w , a , γ > 0 , \(r_{i}>0(i=1,2)\) r i > 0 ( i = 1 , 2 ) , and the functions \(\phi (s)\ge d(s+1)^{\alpha }\) ϕ ( s ) d ( s + 1 ) α and \(0\le \psi (s)\le \chi s(s+1)^{\beta -1}\) 0 ψ ( s ) χ s ( s + 1 ) β - 1 , then we can prove the problem possesses a unique global classical solution. Moreover, when \(d_w\) d w is sufficiently large and certain conditions on \(r_i\) r i are met, we further prove that the steady-states of the preytaxis model are globally stable.