数学物理学报(英文版) ›› 2016, Vol. 36 ›› Issue (5): 1305-1316.doi: 10.1016/S0252-9602(16)30070-4

• 论文 • 上一篇    下一篇

EXISTENCE AND NONEXISTENCE OF SOLUTIONS FOR A HARMONIC EQUATION WITH CRITICAL NONLINEARITY

Kamal OULD BOUH   

  1. Department of Mathematics, College of Sciences, Taibah University, P. O. Box 30097, Almadinah Almunawwarah, KSA
  • 收稿日期:2015-06-23 修回日期:2015-11-17 出版日期:2016-10-25 发布日期:2016-10-25
  • 作者简介:Kamal OULD BOUH,kamalbouh@yahoo.fr,hbouh@taibahu.edu.sa

EXISTENCE AND NONEXISTENCE OF SOLUTIONS FOR A HARMONIC EQUATION WITH CRITICAL NONLINEARITY

Kamal OULD BOUH   

  1. Department of Mathematics, College of Sciences, Taibah University, P. O. Box 30097, Almadinah Almunawwarah, KSA
  • Received:2015-06-23 Revised:2015-11-17 Online:2016-10-25 Published:2016-10-25

摘要:

This paper is concerned with the harmonic equation (P?ε):△u=0, u>0 in Bn and (∂u)/(∂ν)+(n-2)/(2)u=(n-2)/(2)Ku(n)/(n-2)?ε on Sn-1 where Bn is the unit ball in Rn, n≥4 with Euclidean metric g0, Bn=Sn-1 is its boundary, K is a function on Sn-1 and ε is a small positive parameter. We construct solutions of the subcritical equation (P-ε) which blow up at one critical point of K. We give also a sufficient condition on the function K to ensure the nonexistence of solutions for (P-ε) which blow up at one point. Finally, we prove a nonexistence result of single peaked solutions for the supercritical equation (P+ε).

关键词: variational problem, critical points, harmonic equation, mean curvature, critical exponent

Abstract:

This paper is concerned with the harmonic equation (P?ε):△u=0, u>0 in Bn and (∂u)/(∂ν)+(n-2)/(2)u=(n-2)/(2)Ku(n)/(n-2)?ε on Sn-1 where Bn is the unit ball in Rn, n≥4 with Euclidean metric g0, Bn=Sn-1 is its boundary, K is a function on Sn-1 and ε is a small positive parameter. We construct solutions of the subcritical equation (P-ε) which blow up at one critical point of K. We give also a sufficient condition on the function K to ensure the nonexistence of solutions for (P-ε) which blow up at one point. Finally, we prove a nonexistence result of single peaked solutions for the supercritical equation (P+ε).

Key words: variational problem, critical points, harmonic equation, mean curvature, critical exponent

中图分类号: 

  • 35J20