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}
Pub Date : 2025-10-10DOI: 10.1016/j.nonrwa.2025.104515
Haochuan Huang , Rui Huang , Gege Liu , Jingxue Yin
This paper is concerned with the existence and asymptotic behavior of solutions for the Lane-Emden heat flow system. Our arguments are based on the upper and lower solutions method, which is different from the semigroup techniques and a fixed point theorem in previous works [3, 11]. It is worthy of mentioning that our results do not impose the integrability restrictions on initial values and thus the decay rate exponents of the initial values can be selected as the rescaling invariance exponents for the Lane-Emden heat flow system.
{"title":"Rescaling invariance exponents for the Lane-Emden heat flow system","authors":"Haochuan Huang , Rui Huang , Gege Liu , Jingxue Yin","doi":"10.1016/j.nonrwa.2025.104515","DOIUrl":"10.1016/j.nonrwa.2025.104515","url":null,"abstract":"<div><div>This paper is concerned with the existence and asymptotic behavior of solutions for the Lane-Emden heat flow system. Our arguments are based on the upper and lower solutions method, which is different from the semigroup techniques and a fixed point theorem in previous works [3, 11]. It is worthy of mentioning that our results do not impose the integrability restrictions on initial values and thus the decay rate exponents of the initial values can be selected as the <em>rescaling invariance exponents</em> for the Lane-Emden heat flow system.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104515"},"PeriodicalIF":1.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270703","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 : 2025-10-07DOI: 10.1016/j.nonrwa.2025.104512
Nebi Yılmaz , Muhteşem Demir , Erhan Pişkin
This study explores a higher-order viscoelastic equation characterized by variable exponents. We demonstrate the local existence of weak solutions by imposing appropriate conditions on these variable exponents. Furthermore, we investigate the phenomenon of finite-time blow-up for solutions that begin with positive initial energy. Finally, we give a 2D numerical example for the blow up.
{"title":"Local existence and blow-up of solutions for the higher-order viscoelastic equation with general source term and variable exponents: Theoretical and numerical results","authors":"Nebi Yılmaz , Muhteşem Demir , Erhan Pişkin","doi":"10.1016/j.nonrwa.2025.104512","DOIUrl":"10.1016/j.nonrwa.2025.104512","url":null,"abstract":"<div><div>This study explores a higher-order viscoelastic equation characterized by variable exponents. We demonstrate the local existence of weak solutions by imposing appropriate conditions on these variable exponents. Furthermore, we investigate the phenomenon of finite-time blow-up for solutions that begin with positive initial energy. Finally, we give a 2D numerical example for the blow up.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104512"},"PeriodicalIF":1.8,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270702","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 : 2025-10-04DOI: 10.1016/j.nonrwa.2025.104513
Juan Límaco, João Carlos Barreira, Suerlan Silva, Luis P. Yapu
In this paper we use a Stackelberg-Nash strategy to show the local null controllability of a parabolic equation where the diffusion coefficient is the product of a degenerate function in space and a nonlocal term. We consider one control called leader and two controls called followers. To each leader we associate a Nash equilibrium corresponding to a bi-objective optimal control problem; then, we find a leader that solves the null controllability problem. The linearized degenerated system is treated adapting Carleman estimates for degenerated systems from Demarque, Límaco and Viana [31] and the local controllability of the non-linear system is obtained using Liusternik’s inverse function theorem. The nonlocal coefficient originates a multiplicative coupling in the optimality system that gives rise to interesting calculations in the applications of the inverse function theorem.
{"title":"Hierarchical null controllability of a degenerate parabolic equation with nonlocal coefficient","authors":"Juan Límaco, João Carlos Barreira, Suerlan Silva, Luis P. Yapu","doi":"10.1016/j.nonrwa.2025.104513","DOIUrl":"10.1016/j.nonrwa.2025.104513","url":null,"abstract":"<div><div>In this paper we use a Stackelberg-Nash strategy to show the local null controllability of a parabolic equation where the diffusion coefficient is the product of a degenerate function in space and a nonlocal term. We consider one control called <em>leader</em> and two controls called <em>followers</em>. To each leader we associate a Nash equilibrium corresponding to a bi-objective optimal control problem; then, we find a leader that solves the null controllability problem. The linearized degenerated system is treated adapting Carleman estimates for degenerated systems from Demarque, Límaco and Viana [31] and the local controllability of the non-linear system is obtained using Liusternik’s inverse function theorem. The nonlocal coefficient originates a multiplicative coupling in the optimality system that gives rise to interesting calculations in the applications of the inverse function theorem.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"89 ","pages":"Article 104513"},"PeriodicalIF":1.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223607","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 : 2025-09-29DOI: 10.1016/j.nonrwa.2025.104493
Xuanxuan Han, Shaojie Yang
This paper is concerned with the solutions of the quadratic-cubic Camassa–Holm equation which is a model that explore the change in the physical structure of the solutions from the peakons to the bell-shaped solitary wave solutions. The first type of solutions exhibits finite time singularity in the sense of wave breaking. We perform a refined analysis based on the local structure of the dynamics to provide a condition on the initial data to guarantee wave breaking. The key feature of the method is to refine the analysis on characteristics and conserved quantities to the Riccati-type differential inequality. The other type of solutions which we study is the traveling waves, we investigate nonexistence of the Camassa–Holm-type peaked traveling wave solutions. Moreover, we discover how the symmetric structure is connected to the steady structure of solutions to the quadratic-cubic Camassa–Holm equation, and prove that the classical symmetric waves must be traveling wave solutions.
{"title":"Wave breaking and traveling waves for the quadratic-cubic Camassa–Holm equation","authors":"Xuanxuan Han, Shaojie Yang","doi":"10.1016/j.nonrwa.2025.104493","DOIUrl":"10.1016/j.nonrwa.2025.104493","url":null,"abstract":"<div><div>This paper is concerned with the solutions of the quadratic-cubic Camassa–Holm equation which is a model that explore the change in the physical structure of the solutions from the peakons to the bell-shaped solitary wave solutions. The first type of solutions exhibits finite time singularity in the sense of wave breaking. We perform a refined analysis based on the local structure of the dynamics to provide a condition on the initial data to guarantee wave breaking. The key feature of the method is to refine the analysis on characteristics and conserved quantities to the Riccati-type differential inequality. The other type of solutions which we study is the traveling waves, we investigate nonexistence of the Camassa–Holm-type peaked traveling wave solutions. Moreover, we discover how the symmetric structure is connected to the steady structure of solutions to the quadratic-cubic Camassa–Holm equation, and prove that the classical symmetric waves must be traveling wave solutions.</div></div>","PeriodicalId":49745,"journal":{"name":"Nonlinear Analysis-Real World Applications","volume":"88 ","pages":"Article 104493"},"PeriodicalIF":1.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219604","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}