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• 数学 •    下一篇

具有L1初值的非牛顿多方渗流方程解的正性和熄灭性

李春光, 秦莹, 廉松哲, 袁洪君   

  1. 吉林大学 数学学院, 长春 130012
  • 收稿日期:2008-04-18 修回日期:1900-01-01 出版日期:2009-01-26 发布日期:2009-01-26
  • 通讯作者: 秦莹

Extinction and Positivity for the NonNewtonian Polytropic Filtration Equation with L1 Initial Value

LI Chunguang, QIN Ying, LIAN Songzhe, YUAN Hongjun   

  1. College of Mathematics, Jilin University, Changchun 130012, China
  • Received:2008-04-18 Revised:1900-01-01 Online:2009-01-26 Published:2009-01-26
  • Contact: QIN Ying

摘要: 利用比较原理和基本解证明了非牛顿多方渗流方程的解在初值u0(x)∈L1Ω)及零边值条件下具有正性和熄灭性, 其中m>0, p>1.

关键词: 拟线性退化抛物方程, 弱解, 基本解, 熄灭性, 正性

Abstract: This paper deals with the following NonNewtonian polytropic filtration equation possessing the extinction and positivity of the solution by comparison principle and fundamental solution for m>0, p>1 under initial value u0(x)∈L1Ω) and zero boundary value conditions.

Key words: quasilinear degenerate parabolic equation, weak solution, fundamental solution, extinction, positivity

中图分类号: 

  • O175.2