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一类耦合退化抛物方程组解的整体存在与爆破

王泽佳, 楼文奇, 孙仁龙   

  1. 吉林大学 数学学院, 长春 130012
  • 收稿日期:2008-01-23 修回日期:1900-01-01 出版日期:2008-11-26 发布日期:2008-11-26
  • 通讯作者: 王泽佳

Global Existence and Blowup of Solutions for a CoupledDegenerate Parabolic System

WANG Zejia, LOU Wenqi, SUN Renlong   

  1. College of Mathematics, Jilin University, Changchun 130012, China
  • Received:2008-01-23 Revised:1900-01-01 Online:2008-11-26 Published:2008-11-26
  • Contact: WANG Zejia

摘要: 研究一类通过边界条件耦合的非线性快扩散方程组解的长时间行为, 如解关于时间的整体存在性以及解在有限时刻发生爆破等性质. 利用上、 下解方法得到了可以用来刻画解是否整体存在的临界指标, 即整体存在临界曲线.

关键词: 退化抛物方程, 整体存在, 爆破

Abstract: We studied the large time behavior of a class of nonlinear diffusion equations coupled by the boundary conditions, such as global existence in time and blowing up in a finite time. By the upper and lower solutions method, we obtained the critical global existence curve which can be used to describe whether the solution is global existence.

Key words: degenerate parabolic system, global existence, blow up

中图分类号: 

  • O175.26