ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS

doi:10.1016/S0252-9602(11)60311-1

数学物理学报(英文版) ›› 2011, Vol. 31 ›› Issue (4): 1213-1244.doi: 10.1016/S0252-9602(11)60311-1

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ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS

Zakaria Boucheche¹, Ridha Yacoub¹, Hichem Chtioui²

1.Institut Préparatoire aux Etudes d'Ingénieur de Monastir, Avenue Ibn Al Jazzar, 5019 Monastir, Tunisia；2.Département de Mathématiques, Faculté|des Sciences de Sfax, Route Soukra, Sfax, Tunisia

收稿日期:2009-08-27 修回日期:2010-04-08 出版日期:2011-07-20 发布日期:2011-07-20

ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS

Zakaria Boucheche¹, Ridha Yacoub¹, Hichem Chtioui²

1.Institut Préparatoire aux Etudes d'Ingénieur de Monastir, Avenue Ibn Al Jazzar, 5019 Monastir, Tunisia；2.Département de Mathématiques, Faculté|des Sciences de Sfax, Route Soukra, Sfax, Tunisia

Received:2009-08-27 Revised:2010-04-08 Online:2011-07-20 Published:2011-07-20

摘要/Abstract

摘要：

In this paper, we consider the problem of existence as well as multiplicity results for a bi-harmonic equation under the Navier
boundary conditions: Δ² u=K(x)u^p, u>0 in Ω, Δu= u=0 on ∂Ω, where Ω is a smooth domain in Rⁿ, n≥5, and p+1 = 2n/n-4 is the critical Sobolev exponent. We obtain highlightly a new criterion of existence, which provides existence results for a dense subset of positive functions, and generalizes Bahri-Coron type criterion in dimension six. Our argument gives also estimates on the Morse index of the obtained solutions and extends some known results. Moreover, it provides, for generic K, Morse inequalities at infinity, which delivers lower bounds for the number of solutions. As further applications of this Morse theoretical approach, we prove more existence results.

关键词: critical points at infinity, Palais-Smale condition, Morse lemma at infinity, Morse inequalities

Abstract:

Key words: critical points at infinity, Palais-Smale condition, Morse lemma at infinity, Morse inequalities

中图分类号:

53C15

Zakaria Boucheche, Ridha Yacoub, Hichem Chtioui. ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS[J]. 数学物理学报(英文版), 2011, 31(4): 1213-1244.

Zakaria Boucheche, Ridha Yacoub, Hichem Chtioui. ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS[J]. Acta mathematica scientia,Series B, 2011, 31(4): 1213-1244.

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ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS

ON A BI-HARMONIC EQUATION INVOLVING CRITICAL EXPONENT: EXISTENCE AND MULTIPLICITY RESULTS

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