吉林大学学报(理学版) ›› 2020, Vol. 58 ›› Issue (4): 733-743.

• 数学 •    下一篇

一类耦合半线性扩散方程组的Fujita临界曲线

周倩1, 那杨2, 高冬3   

  1. 1. 吉林大学 数学学院, 长春 130012; 2. 长春工业大学 数学与统计学院, 长春 130012;3. 吉林大学 计算机科学与技术学院, 长春 130012
  • 收稿日期:2019-12-15 出版日期:2020-07-26 发布日期:2020-07-16
  • 通讯作者: 那杨 E-mail:nayang_1989@163.com

Fujita Critical Curves for a Class ofCoupled Semilinear Diffusion Systems

ZHOU Qian1, NA Yang2, GAO Dong3   

  1. 1. College of Mathematics, Jilin University, Changchun 130012, China;
    2. School of Mathematics and Statistics, Changchun University of Technology, Changchun 130012, China;
    3. College of Computer Science and Technology, Jilin University, Changchun 130012, China
  • Received:2019-12-15 Online:2020-07-26 Published:2020-07-16
  • Contact: NA Yang E-mail:nayang_1989@163.com

摘要: 利用能量估计方法和比较原理研究一类有一阶项的耦合半线性扩散方程组Cauchy问题解的长时间渐近行为, 给出刻画解整体存在与爆破性质的Fujita临界曲线, 并建立Fujita型定理.

关键词: 耦合扩散方程组, Fujita临界曲线, Fujita型定理

Abstract: By using the method of energy estimates and the comparison principle, we studied the long time asymptotic behavior of solutions to the Cauchy problems of a class of coupled semilinear diffusion systems with firstorder terms. We gave the Fujita critical curves which described the global existence and blowup properties of solutions, and established the theorems of Fujita type.

Key words: coupled diffusion systems, Fujita critical curve, theorem of Fujita type

中图分类号: 

  • O175.23