Pub Date : 2025-10-29DOI: 10.1016/j.nonrwa.2025.104527
Thi Ngoc Ha Vu, Thieu Huy Nguyen
We study the Navier-Stokes equations in a rotating framework near the surface Ekman layer and establish the existence and polynomial stability of a time-periodic solution under the action of a time-periodic external force. Furthermore, when the external forcing is almost periodic in time, we prove the existence and stability of an almost periodic solution. These results describe the nonlinear dynamics of (almost) harmonic oscillations around the surface Ekman spiral. In the absence of external forcing, the nonlinear stability of the Ekman spiral profile follows as a direct consequence.
{"title":"Harmonic oscillations and their stability around surface Ekman layer","authors":"Thi Ngoc Ha Vu, Thieu Huy Nguyen","doi":"10.1016/j.nonrwa.2025.104527","DOIUrl":"10.1016/j.nonrwa.2025.104527","url":null,"abstract":"<div><div>We study the Navier-Stokes equations in a rotating framework near the surface Ekman layer and establish the existence and polynomial stability of a time-periodic solution under the action of a time-periodic external force. Furthermore, when the external forcing is almost periodic in time, we prove the existence and stability of an almost periodic solution. These results describe the nonlinear dynamics of (almost) harmonic oscillations around the surface Ekman spiral. In the absence of external forcing, the nonlinear stability of the Ekman spiral profile follows as a direct consequence.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104527"},"PeriodicalIF":1.8,"publicationDate":"2025-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145424874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-28DOI: 10.1016/j.nonrwa.2025.104524
Xiaodan Chen, Renhao Cui
In this paper, we are concerned with a diffusion-advection SIS (susceptible-infected-susceptible) epidemic model with saturated incidence mechanism and birth-death effect. The basic reproduction number has been derived through a variational expression and determined the threshold dynamics. We mainly investigate spatial profiles of endemic equilibrium with respect to large advection, small dispersal of susceptible/infected individuals and large saturation. These results may offer some prospective applications on disease control and prediction.
{"title":"Spatial profiles of a diffusion-advection epidemic model with saturated incidence mechanism and birth-death effect","authors":"Xiaodan Chen, Renhao Cui","doi":"10.1016/j.nonrwa.2025.104524","DOIUrl":"10.1016/j.nonrwa.2025.104524","url":null,"abstract":"<div><div>In this paper, we are concerned with a diffusion-advection SIS (susceptible-infected-susceptible) epidemic model with saturated incidence mechanism and birth-death effect. The basic reproduction number <span><math><msub><mi>R</mi><mn>0</mn></msub></math></span> has been derived through a variational expression and determined the threshold dynamics. We mainly investigate spatial profiles of endemic equilibrium with respect to large advection, small dispersal of susceptible/infected individuals and large saturation. These results may offer some prospective applications on disease control and prediction.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104524"},"PeriodicalIF":1.8,"publicationDate":"2025-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145424894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-27DOI: 10.1016/j.nonrwa.2025.104526
Na Li
This paper is devoted to studying propagation dynamics in an age-structured population model incorporating two interacting nonlocal mechanisms. We analyze how interactions between nonlocal dispersal kernels shape propagation dynamics based on comparison arguments and the evolutionary viewpoint. By appealing to monotone dynamical system theory, we investigate the existence of spreading speed and its variational characterization. By developing a framework for establishing the fundamental solution and its refined estimates, we construct sub- and super-solutions to rigorously prove the sharp rate of accelerating propagation, which is closely related to the tail heaviness of the convolution of two nonlocal dispersal kernels. Additionally, the influence of time delay on the rate of propagation is discussed under specific conditions. Our findings reveal the crucial role of interactions between nonlocal dispersal kernels in determining the rate of propagation.
{"title":"Sharp rate of accelerating propagation in a nonlocal model arising in population dynamics","authors":"Na Li","doi":"10.1016/j.nonrwa.2025.104526","DOIUrl":"10.1016/j.nonrwa.2025.104526","url":null,"abstract":"<div><div>This paper is devoted to studying propagation dynamics in an age-structured population model incorporating two interacting nonlocal mechanisms. We analyze how interactions between nonlocal dispersal kernels shape propagation dynamics based on comparison arguments and the evolutionary viewpoint. By appealing to monotone dynamical system theory, we investigate the existence of spreading speed and its variational characterization. By developing a framework for establishing the fundamental solution and its refined estimates, we construct sub- and super-solutions to rigorously prove the sharp rate of accelerating propagation, which is closely related to the tail heaviness of the convolution of two nonlocal dispersal kernels. Additionally, the influence of time delay on the rate of propagation is discussed under specific conditions. Our findings reveal the crucial role of interactions between nonlocal dispersal kernels in determining the rate of propagation.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104526"},"PeriodicalIF":1.8,"publicationDate":"2025-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145424895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-26DOI: 10.1016/j.nonrwa.2025.104522
Eddye Bustamante, José Jiménez Urrea, Jorge Mejía
In this work we establish a dispersive blow-up result for the initial value problem (IVP) for the coupled Schrödinger-fifth order Korteweg-de Vries systemTo achieve this, we prove a local well-posedness result in Bourgain spaces of the type , along with a regularity property for the nonlinear part of the IVP solutions. This property enables the construction of initial data that leads to the dispersive blow-up phenomenon.
{"title":"Dispersive blow-up for a coupled Schrödinger-fifth order KdV system","authors":"Eddye Bustamante, José Jiménez Urrea, Jorge Mejía","doi":"10.1016/j.nonrwa.2025.104522","DOIUrl":"10.1016/j.nonrwa.2025.104522","url":null,"abstract":"<div><div>In this work we establish a dispersive blow-up result for the initial value problem (IVP) for the coupled Schrödinger-fifth order Korteweg-de Vries system<span><span><span><math><mtable><mtr><mtd><mrow><mtable><mtr><mtd><mrow><mi>i</mi><msub><mi>u</mi><mi>t</mi></msub><mo>+</mo><msubsup><mi>∂</mi><mi>x</mi><mn>2</mn></msubsup><mspace></mspace><mi>u</mi></mrow></mtd><mtd><mrow><mo>=</mo><mi>α</mi><mi>u</mi><mi>v</mi><mo>+</mo><msup><mrow><mi>γ</mi><mo>|</mo><mi>u</mi><mo>|</mo></mrow><mn>2</mn></msup><mspace></mspace><mi>u</mi><mo>,</mo><mspace></mspace><mi>x</mi><mo>∈</mo><mi>R</mi><mo>,</mo><mspace></mspace><mi>t</mi><mo>∈</mo><mi>R</mi><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><msub><mi>∂</mi><mi>t</mi></msub><mi>v</mi><mo>+</mo><msubsup><mi>∂</mi><mi>x</mi><mn>5</mn></msubsup><mi>v</mi><mo>+</mo><msub><mi>∂</mi><mi>x</mi></msub><msup><mi>v</mi><mn>2</mn></msup></mrow></mtd><mtd><mrow><mo>=</mo><mi>ϵ</mi><msub><mi>∂</mi><mi>x</mi></msub><msup><mrow><mo>|</mo><mi>u</mi><mo>|</mo></mrow><mn>2</mn></msup><mo>,</mo><mspace></mspace><mi>x</mi><mo>∈</mo><mi>R</mi><mo>,</mo><mspace></mspace><mi>t</mi><mo>∈</mo><mi>R</mi><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><mi>u</mi><mo>(</mo><mi>x</mi><mo>,</mo><mn>0</mn><mo>)</mo></mrow></mtd><mtd><mrow><mo>=</mo><msub><mi>u</mi><mn>0</mn></msub><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>,</mo><mspace></mspace><mi>v</mi><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mn>0</mn><mo>)</mo></mrow><mo>=</mo><msub><mi>v</mi><mn>0</mn></msub><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>.</mo></mrow></mtd></mtr></mtable><mo>}</mo></mrow></mtd></mtr></mtable></math></span></span></span>To achieve this, we prove a local well-posedness result in Bourgain spaces of the type <span><math><mrow><msup><mi>X</mi><mrow><mi>s</mi><mo>+</mo><mi>β</mi><mo>,</mo><mi>b</mi></mrow></msup><mo>×</mo><msup><mi>Y</mi><mrow><mi>s</mi><mo>,</mo><mi>b</mi></mrow></msup></mrow></math></span>, along with a regularity property for the nonlinear part of the IVP solutions. This property enables the construction of initial data that leads to the dispersive blow-up phenomenon.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104522"},"PeriodicalIF":1.8,"publicationDate":"2025-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145424893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-24DOI: 10.1016/j.nonrwa.2025.104523
Taian Jin, Yuxiang Li
<div><div>We study the Neumann initial-boundary value problem for the following quasilinear chemotaxis system with indirect signal production<span><span><span><span><math><mi>★</mi></math></span></span><span><math><mtable><mtr><mtd><mrow><mo>{</mo><mtable><mtr><mtd><mrow><msub><mi>u</mi><mi>t</mi></msub><mo>=</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>D</mi><mo>(</mo><mi>u</mi><mo>)</mo><mi>∇</mi><mi>u</mi><mo>)</mo></mrow><mo>−</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>S</mi><mrow><mo>(</mo><mi>u</mi><mo>)</mo></mrow><mi>∇</mi><mi>v</mi><mo>)</mo></mrow><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>0</mn><mo>=</mo><mstyle><mi>Δ</mi></mstyle><mi>v</mi><mo>−</mo><mi>μ</mi><mo>(</mo><mi>t</mi><mo>)</mo><mo>+</mo><mi>w</mi><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><msub><mi>w</mi><mi>t</mi></msub><mo>+</mo><mi>w</mi><mo>=</mo><mi>u</mi></mrow></mtd></mtr></mtable></mrow></mtd></mtr></mtable></math></span></span></span>in <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>⊂</mo><mi>R</mi><msup><mrow></mrow><mi>n</mi></msup></mrow></math></span> with <span><math><mrow><mi>n</mi><mo>≥</mo><mn>1</mn></mrow></math></span>. Here <span><math><mrow><mi>μ</mi><mrow><mo>(</mo><mi>t</mi><mo>)</mo></mrow><mo>:</mo><mo>=</mo><msub><mi>⨏</mi><mstyle><mi>Ω</mi></mstyle></msub><mi>w</mi><mrow><mo>(</mo><mo>·</mo><mo>,</mo><mi>t</mi><mo>)</mo></mrow></mrow></math></span>, <span><math><mrow><mi>D</mi><mo>∈</mo><mi>C</mi><msup><mrow></mrow><mn>2</mn></msup><mrow><mo>(</mo><mrow><mo>[</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow><mo>)</mo></mrow><mspace></mspace><mtext>is</mtext><mspace></mspace><mtext>positive</mtext><mspace></mspace><mtext>on</mtext><mspace></mspace><mrow><mo>[</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mi>S</mi><mo>∈</mo><mi>C</mi><msup><mrow></mrow><mn>2</mn></msup><mrow><mo>(</mo><mrow><mo>[</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow><mo>)</mo></mrow><mspace></mspace><mtext>is</mtext><mspace></mspace><mtext>nonnegative</mtext></mrow></math></span>. We prove the following:<ul><li><span>•</span><span><div>If <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>=</mo><msub><mi>B</mi><mi>R</mi></msub><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></mrow></math></span> with some <span><math><mrow><mi>R</mi><mo>></mo><mn>0</mn></mrow></math></span>, <span><math><mrow><mi>D</mi><mrow><mo>(</mo><mi>s</mi><mo>)</mo></mrow><mo>≤</mo><msub><mi>k</mi><mn>1</mn></msub><mi>s</mi><msup><mrow></mrow><mi>q</mi></msup></mrow></math></span> and <span><math><mrow><mi>S</mi><mrow><mo>(</mo><mi>s</mi><mo>)</mo></mrow><mo>≥</mo><msub><mi>k</mi><mn>2</mn></msub><mi>s</mi><msup><mrow></mrow><mi>p</mi></msup></mrow></math></span> for all <span><math><mrow><mi>s</mi><mo>≥</mo><mn>1</mn></mrow></math></span>, where <span><math><mrow><msub><mi>k</mi><mn>1</mn></msub><mo>,</mo><msub><mi>k</mi><mn>2</mn></msub><mo>,</mo><mi>p</mi><mo>></mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mi>p</mi><mo>
{"title":"Finite time blow-up in a quasilinear Keller-Segel system with indirect signal production","authors":"Taian Jin, Yuxiang Li","doi":"10.1016/j.nonrwa.2025.104523","DOIUrl":"10.1016/j.nonrwa.2025.104523","url":null,"abstract":"<div><div>We study the Neumann initial-boundary value problem for the following quasilinear chemotaxis system with indirect signal production<span><span><span><span><math><mi>★</mi></math></span></span><span><math><mtable><mtr><mtd><mrow><mo>{</mo><mtable><mtr><mtd><mrow><msub><mi>u</mi><mi>t</mi></msub><mo>=</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>D</mi><mo>(</mo><mi>u</mi><mo>)</mo><mi>∇</mi><mi>u</mi><mo>)</mo></mrow><mo>−</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>S</mi><mrow><mo>(</mo><mi>u</mi><mo>)</mo></mrow><mi>∇</mi><mi>v</mi><mo>)</mo></mrow><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><mn>0</mn><mo>=</mo><mstyle><mi>Δ</mi></mstyle><mi>v</mi><mo>−</mo><mi>μ</mi><mo>(</mo><mi>t</mi><mo>)</mo><mo>+</mo><mi>w</mi><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><msub><mi>w</mi><mi>t</mi></msub><mo>+</mo><mi>w</mi><mo>=</mo><mi>u</mi></mrow></mtd></mtr></mtable></mrow></mtd></mtr></mtable></math></span></span></span>in <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>⊂</mo><mi>R</mi><msup><mrow></mrow><mi>n</mi></msup></mrow></math></span> with <span><math><mrow><mi>n</mi><mo>≥</mo><mn>1</mn></mrow></math></span>. Here <span><math><mrow><mi>μ</mi><mrow><mo>(</mo><mi>t</mi><mo>)</mo></mrow><mo>:</mo><mo>=</mo><msub><mi>⨏</mi><mstyle><mi>Ω</mi></mstyle></msub><mi>w</mi><mrow><mo>(</mo><mo>·</mo><mo>,</mo><mi>t</mi><mo>)</mo></mrow></mrow></math></span>, <span><math><mrow><mi>D</mi><mo>∈</mo><mi>C</mi><msup><mrow></mrow><mn>2</mn></msup><mrow><mo>(</mo><mrow><mo>[</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow><mo>)</mo></mrow><mspace></mspace><mtext>is</mtext><mspace></mspace><mtext>positive</mtext><mspace></mspace><mtext>on</mtext><mspace></mspace><mrow><mo>[</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mi>S</mi><mo>∈</mo><mi>C</mi><msup><mrow></mrow><mn>2</mn></msup><mrow><mo>(</mo><mrow><mo>[</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow><mo>)</mo></mrow><mspace></mspace><mtext>is</mtext><mspace></mspace><mtext>nonnegative</mtext></mrow></math></span>. We prove the following:<ul><li><span>•</span><span><div>If <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>=</mo><msub><mi>B</mi><mi>R</mi></msub><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></mrow></math></span> with some <span><math><mrow><mi>R</mi><mo>></mo><mn>0</mn></mrow></math></span>, <span><math><mrow><mi>D</mi><mrow><mo>(</mo><mi>s</mi><mo>)</mo></mrow><mo>≤</mo><msub><mi>k</mi><mn>1</mn></msub><mi>s</mi><msup><mrow></mrow><mi>q</mi></msup></mrow></math></span> and <span><math><mrow><mi>S</mi><mrow><mo>(</mo><mi>s</mi><mo>)</mo></mrow><mo>≥</mo><msub><mi>k</mi><mn>2</mn></msub><mi>s</mi><msup><mrow></mrow><mi>p</mi></msup></mrow></math></span> for all <span><math><mrow><mi>s</mi><mo>≥</mo><mn>1</mn></mrow></math></span>, where <span><math><mrow><msub><mi>k</mi><mn>1</mn></msub><mo>,</mo><msub><mi>k</mi><mn>2</mn></msub><mo>,</mo><mi>p</mi><mo>></mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mi>p</mi><mo>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104523"},"PeriodicalIF":1.8,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-21DOI: 10.1016/j.nonrwa.2025.104520
Quanyong Zhao, Jinrong Wang
<div><div>This paper is devoted to investigating the logistic source damping effect of the following model<span><span><span><math><mtable><mtr><mtd><mrow><mo>{</mo><mtable><mtr><mtd><mrow><msub><mi>u</mi><mi>t</mi></msub><mo>=</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>φ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mi>∇</mi><mi>u</mi><mo>)</mo></mrow><mo>−</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>u</mi><mi>χ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mi>∇</mi><mi>v</mi><mo>)</mo></mrow><mo>+</mo><mi>r</mi><mi>u</mi><mo>−</mo><mi>μ</mi><msup><mi>u</mi><mi>α</mi></msup><mo>,</mo></mrow></mtd><mtd><mrow><mi>x</mi><mo>∈</mo><mstyle><mi>Ω</mi></mstyle><mo>,</mo><mi>t</mi><mo>></mo><mn>0</mn><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><msub><mi>v</mi><mi>t</mi></msub><mo>=</mo><mstyle><mi>Δ</mi></mstyle><mi>v</mi><mo>−</mo><mi>v</mi><mo>+</mo><mi>u</mi><mo>,</mo></mrow></mtd><mtd><mrow><mi>x</mi><mo>∈</mo><mstyle><mi>Ω</mi></mstyle><mo>,</mo><mi>t</mi><mo>></mo><mn>0</mn><mo>,</mo></mrow></mtd></mtr></mtable></mrow></mtd></mtr></mtable></math></span></span></span>under homogeneous Neumann boundary conditions in a smooth bounded domain <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>⊂</mo><msup><mi>R</mi><mi>n</mi></msup></mrow></math></span>, where <span><math><mrow><mi>r</mi><mo>∈</mo><mi>R</mi><mo>,</mo><mi>μ</mi><mo>≥</mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mi>α</mi><mo>></mo><mn>1</mn></mrow></math></span> are constants. For the case <span><math><mrow><mrow><mo>(</mo><mi>φ</mi><mo>,</mo><mi>χ</mi><mo>)</mo></mrow><mo>∈</mo><msup><mrow><mo>[</mo><msup><mi>C</mi><mn>2</mn></msup><mrow><mo>(</mo><mrow><mo>(</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow><mo>)</mo></mrow><mo>]</mo></mrow><mn>2</mn></msup><mo>,</mo><mi>φ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>></mo><mn>0</mn><mspace></mspace><mtext>and</mtext><mspace></mspace><mfrac><msup><mrow><mo>|</mo><mi>χ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>|</mo></mrow><mn>2</mn></msup><mrow><mi>φ</mi><mo>(</mo><mi>v</mi><mo>)</mo></mrow></mfrac></mrow></math></span> is bounded on <span><math><mrow><mo>(</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow></math></span>, generating the prototypical choice given by <span><math><mrow><mi>φ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>=</mo><msup><mi>v</mi><mrow><mo>−</mo><mi>k</mi></mrow></msup></mrow></math></span> and <span><math><mrow><mi>χ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>=</mo><mi>k</mi><msup><mi>v</mi><mrow><mo>−</mo><mi>k</mi><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> with <span><math><mrow><mi>k</mi><mo>></mo><mn>0</mn></mrow></math></span>, it is shown that even with large initial data, the existence of the global classical solution to the above problem can be achieved when <span><math><mrow><mi>α</mi><mo>></mo><mn>3</mn><mo>−</mo><mfrac><mn>6</mn><mrow><mi>n</mi><mo>+</mo><mn>4</mn></mrow></mfrac></mrow></math></span> with <span><math><mrow
{"title":"A note on the logistic damping effect to ensure the global solvability of the chemotaxis system with degenerate signal-dependent motility","authors":"Quanyong Zhao, Jinrong Wang","doi":"10.1016/j.nonrwa.2025.104520","DOIUrl":"10.1016/j.nonrwa.2025.104520","url":null,"abstract":"<div><div>This paper is devoted to investigating the logistic source damping effect of the following model<span><span><span><math><mtable><mtr><mtd><mrow><mo>{</mo><mtable><mtr><mtd><mrow><msub><mi>u</mi><mi>t</mi></msub><mo>=</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>φ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mi>∇</mi><mi>u</mi><mo>)</mo></mrow><mo>−</mo><mi>∇</mi><mo>·</mo><mrow><mo>(</mo><mi>u</mi><mi>χ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mi>∇</mi><mi>v</mi><mo>)</mo></mrow><mo>+</mo><mi>r</mi><mi>u</mi><mo>−</mo><mi>μ</mi><msup><mi>u</mi><mi>α</mi></msup><mo>,</mo></mrow></mtd><mtd><mrow><mi>x</mi><mo>∈</mo><mstyle><mi>Ω</mi></mstyle><mo>,</mo><mi>t</mi><mo>></mo><mn>0</mn><mo>,</mo></mrow></mtd></mtr><mtr><mtd><mrow><msub><mi>v</mi><mi>t</mi></msub><mo>=</mo><mstyle><mi>Δ</mi></mstyle><mi>v</mi><mo>−</mo><mi>v</mi><mo>+</mo><mi>u</mi><mo>,</mo></mrow></mtd><mtd><mrow><mi>x</mi><mo>∈</mo><mstyle><mi>Ω</mi></mstyle><mo>,</mo><mi>t</mi><mo>></mo><mn>0</mn><mo>,</mo></mrow></mtd></mtr></mtable></mrow></mtd></mtr></mtable></math></span></span></span>under homogeneous Neumann boundary conditions in a smooth bounded domain <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>⊂</mo><msup><mi>R</mi><mi>n</mi></msup></mrow></math></span>, where <span><math><mrow><mi>r</mi><mo>∈</mo><mi>R</mi><mo>,</mo><mi>μ</mi><mo>≥</mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mi>α</mi><mo>></mo><mn>1</mn></mrow></math></span> are constants. For the case <span><math><mrow><mrow><mo>(</mo><mi>φ</mi><mo>,</mo><mi>χ</mi><mo>)</mo></mrow><mo>∈</mo><msup><mrow><mo>[</mo><msup><mi>C</mi><mn>2</mn></msup><mrow><mo>(</mo><mrow><mo>(</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow><mo>)</mo></mrow><mo>]</mo></mrow><mn>2</mn></msup><mo>,</mo><mi>φ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>></mo><mn>0</mn><mspace></mspace><mtext>and</mtext><mspace></mspace><mfrac><msup><mrow><mo>|</mo><mi>χ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>|</mo></mrow><mn>2</mn></msup><mrow><mi>φ</mi><mo>(</mo><mi>v</mi><mo>)</mo></mrow></mfrac></mrow></math></span> is bounded on <span><math><mrow><mo>(</mo><mn>0</mn><mo>,</mo><mi>∞</mi><mo>)</mo></mrow></math></span>, generating the prototypical choice given by <span><math><mrow><mi>φ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>=</mo><msup><mi>v</mi><mrow><mo>−</mo><mi>k</mi></mrow></msup></mrow></math></span> and <span><math><mrow><mi>χ</mi><mrow><mo>(</mo><mi>v</mi><mo>)</mo></mrow><mo>=</mo><mi>k</mi><msup><mi>v</mi><mrow><mo>−</mo><mi>k</mi><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> with <span><math><mrow><mi>k</mi><mo>></mo><mn>0</mn></mrow></math></span>, it is shown that even with large initial data, the existence of the global classical solution to the above problem can be achieved when <span><math><mrow><mi>α</mi><mo>></mo><mn>3</mn><mo>−</mo><mfrac><mn>6</mn><mrow><mi>n</mi><mo>+</mo><mn>4</mn></mrow></mfrac></mrow></math></span> with <span><math><mrow","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104520"},"PeriodicalIF":1.8,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-21DOI: 10.1016/j.nonrwa.2025.104519
Ibtissam Issa, Cristina Pignotti
This study explores the generalized Korteweg-de Vries-Burgers equation incorporating delay feedback and a damping term. Using semigroup arguments and Lyapunov functional techniques, we establish the existence of a global solution when the exponent of the nonlinear term satisfies some growth conditions. Furthermore, we prove exponential stability estimates under suitable assumptions: first in the case of a positive damping coefficient, then within a more comprehensive framework, accommodating sign changes in both coefficients, i.e. for the damping and the delay feedback. In both cases, we adopt refined conditions on the delay feedback’s coefficient, extending and enhancing existing results in the literature. In particular, our conditions are independent of the time delay size.
{"title":"Time-delayed generalized Korteweg–de Vries-Burgers equation: Well-posedness and exponential decay","authors":"Ibtissam Issa, Cristina Pignotti","doi":"10.1016/j.nonrwa.2025.104519","DOIUrl":"10.1016/j.nonrwa.2025.104519","url":null,"abstract":"<div><div>This study explores the generalized Korteweg-de Vries-Burgers equation incorporating delay feedback and a damping term. Using semigroup arguments and Lyapunov functional techniques, we establish the existence of a global solution when the exponent of the nonlinear term satisfies some growth conditions. Furthermore, we prove exponential stability estimates under suitable assumptions: first in the case of a positive damping coefficient, then within a more comprehensive framework, accommodating sign changes in both coefficients, i.e. for the damping and the delay feedback. In both cases, we adopt refined conditions on the delay feedback’s coefficient, extending and enhancing existing results in the literature. In particular, our conditions are independent of the time delay size.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104519"},"PeriodicalIF":1.8,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-15DOI: 10.1016/j.nonrwa.2025.104516
Nishith Mohan, Christina Surulescu
We study a model for the spread and (de)differentiation of mesenchymal stem cells and chondrocytes in a scaffold whose fibers are coated with hyaluron. The chondrocytes produce new extracellular matrix, which, together with hyaluron, serves as a haptotactic cue for the stem cell migration. We prove global existence of weak solutions of the corresponding cross-diffusion system with double haptotaxis.
{"title":"Global existence of weak solutions to a cell migration and (de)differentiation model with double haptotaxis in the context of tissue regeneration","authors":"Nishith Mohan, Christina Surulescu","doi":"10.1016/j.nonrwa.2025.104516","DOIUrl":"10.1016/j.nonrwa.2025.104516","url":null,"abstract":"<div><div>We study a model for the spread and (de)differentiation of mesenchymal stem cells and chondrocytes in a scaffold whose fibers are coated with hyaluron. The chondrocytes produce new extracellular matrix, which, together with hyaluron, serves as a haptotactic cue for the stem cell migration. We prove global existence of weak solutions of the corresponding cross-diffusion system with double haptotaxis.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104516"},"PeriodicalIF":1.8,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-14DOI: 10.1016/j.nonrwa.2025.104518
Meiling Zhou, Liangwei Wang, Jingxue Yin, Can Lu
In this paper, we study the non-Newtonian polytropic filtration equation with a positive initial data on a smooth bounded domain for , where , , and in particular . To investigate the regularity of solutions to the Dirichlet problem for this equation when the initial data exhibit a singularity of the form for with and , we introduce a linear diffusion term in the regularization process. This addition ensures that the equation remains uniformly parabolic, thereby satisfying both the maximum principle and the comparison principle. The desired results are obtained provided that the coefficient of this regularization term converges to zero in the norm of the appropriate function space. This paper shows that the behavior of the solution depends critically on the value of the exponent in the initial data, leading to the following distinct cases: finite-time boundedness, infinite-time boundedness, singular stabilization, and infinite-time blow-up.
本文研究了光滑有界域Ω∧Rn上具有正初始数据的非牛顿多向滤波方程ut−div(|∇um|p−2∇um)=0,其中n≥3,0<m< 1,2 <p<1+1m,特别是p<;n(m+1)1+mn。为了研究该方程的Dirichlet问题解的正则性,当初始数据表现为形式为u0(x) ~ a |x|−γ的奇点时,对于x∈Ω∈{0},具有a >;0和γ>;0,我们在正则化过程中引入线性扩散项。这一补充保证了方程保持一致抛物,从而同时满足极大值原理和比较原理。当正则化项的系数在适当的函数空间范数内收敛于零时,得到了期望的结果。本文证明了解的行为严重依赖于初始数据中指数γ的值,从而导致以下不同的情况:有限时间有界性,无限时间有界性,奇异稳定和无限时间爆破。
{"title":"Singularities of solutions to the non-Newtonian polytropic filtration","authors":"Meiling Zhou, Liangwei Wang, Jingxue Yin, Can Lu","doi":"10.1016/j.nonrwa.2025.104518","DOIUrl":"10.1016/j.nonrwa.2025.104518","url":null,"abstract":"<div><div>In this paper, we study the non-Newtonian polytropic filtration equation <span><math><mrow><msub><mi>u</mi><mi>t</mi></msub><mo>−</mo><mi>div</mi><mrow><mo>(</mo><msup><mrow><mo>|</mo><mrow><mi>∇</mi><msup><mi>u</mi><mi>m</mi></msup></mrow><mo>|</mo></mrow><mrow><mi>p</mi><mo>−</mo><mn>2</mn></mrow></msup><mi>∇</mi><msup><mi>u</mi><mi>m</mi></msup><mo>)</mo></mrow><mo>=</mo><mn>0</mn></mrow></math></span> with a positive initial data on a smooth bounded domain <span><math><mrow><mstyle><mi>Ω</mi></mstyle><mo>⊂</mo><msup><mi>R</mi><mi>n</mi></msup></mrow></math></span> for <span><math><mrow><mi>n</mi><mo>≥</mo><mn>3</mn></mrow></math></span>, where <span><math><mrow><mn>0</mn><mo><</mo><mi>m</mi><mo><</mo><mn>1</mn></mrow></math></span>, <span><math><mrow><mn>2</mn><mo><</mo><mi>p</mi><mo><</mo><mn>1</mn><mo>+</mo><mfrac><mn>1</mn><mi>m</mi></mfrac></mrow></math></span>, and in particular <span><math><mrow><mi>p</mi><mo><</mo><mfrac><mrow><mi>n</mi><mrow><mo>(</mo><mrow><mi>m</mi><mo>+</mo><mn>1</mn></mrow><mo>)</mo></mrow></mrow><mrow><mn>1</mn><mo>+</mo><mi>m</mi><mi>n</mi></mrow></mfrac></mrow></math></span>. To investigate the regularity of solutions to the Dirichlet problem for this equation when the initial data exhibit a singularity of the form <span><math><mrow><msub><mi>u</mi><mn>0</mn></msub><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>∼</mo><mi>A</mi><msup><mrow><mo>|</mo><mi>x</mi><mo>|</mo></mrow><mrow><mo>−</mo><mi>γ</mi></mrow></msup></mrow></math></span> for <span><math><mrow><mi>x</mi><mo>∈</mo><mstyle><mi>Ω</mi></mstyle><mo>∖</mo><mo>{</mo><mn>0</mn><mo>}</mo></mrow></math></span> with <span><math><mrow><mi>A</mi><mo>></mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mi>γ</mi><mo>></mo><mn>0</mn></mrow></math></span>, we introduce a linear diffusion term in the regularization process. This addition ensures that the equation remains uniformly parabolic, thereby satisfying both the maximum principle and the comparison principle. The desired results are obtained provided that the coefficient of this regularization term converges to zero in the norm of the appropriate function space. This paper shows that the behavior of the solution depends critically on the value of the exponent <span><math><mi>γ</mi></math></span> in the initial data, leading to the following distinct cases: finite-time boundedness, infinite-time boundedness, singular stabilization, and infinite-time blow-up.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104518"},"PeriodicalIF":1.8,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-10DOI: 10.1016/j.nonrwa.2025.104517
Ying Dai , Ying Sun , Hao Xu
This paper is concerned with an initial-boundary value problem of 2D barotropic compressible Navier–Stokes equations subject to slip boundary conditions. Under the assumption that the density is uniformly bounded from above, we study the convergence of the solutions to its associated equilibrium with an exponential decay rate. The analysis is based on the elementary energy methods, the techniques from blow-up criterion and some new estimates for the gradient of velocity.
{"title":"Large-time behavior of large solutions to the 2D compressible Navier–Stokes equations with slip boundary conditions","authors":"Ying Dai , Ying Sun , Hao Xu","doi":"10.1016/j.nonrwa.2025.104517","DOIUrl":"10.1016/j.nonrwa.2025.104517","url":null,"abstract":"<div><div>This paper is concerned with an initial-boundary value problem of 2D barotropic compressible Navier–Stokes equations subject to slip boundary conditions. Under the assumption that the density is uniformly bounded from above, we study the convergence of the solutions to its associated equilibrium with an exponential decay rate. The analysis is based on the elementary energy methods, the techniques from blow-up criterion and some new estimates for the gradient of velocity.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104517"},"PeriodicalIF":1.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}